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Both ensure the stability and safety when sitting on the chair. Heavy duty metal base: upgraded office chair base replacement from Mastery Mart is made of high-quality chrome. And the height of the base with low gravity center design is 4''10cm.
It provides greater carrying capacity up to 2400+Lbs with ANSI and BIFMA certification. Standard caster sockets: 7/16’’ x 7/8’’ 11mm x 22mm. No worries about weight 500Lbs or more. Save money and keep your favorite chair. The office chair replacement base has wide application in most types of chairs on the market like office chairs, computer chairs, gaming chairs, executive chairs and others.

Revive your chair for saving money: if your chair or stool starts sinking, our replacement chair cylinder is built to last a lifetime, leaking gas or failing, or at home, replace a gas lift cylinder instead of spending money on a brand new computer chair.
You need a chair that supports you while you're at work, without any unwanted sinking. Replace your office chair gas cylinder and stop worrying about disturbing anyone, freely lift and rotate your office chair smoothly and quietly. Your satisfaction is always our top priority. 5. 5’’ piston stroke for adjusting chair height: this desk chair cylinder extends from 285mm to 425mm 11.



Affordable & universal replacement for most office chairs: The office chair base with universal caster and gas cylinder size works perfectly with almost every office chair, desk chair, gaming chair, task chair and swivel chair on the market which helps with saving your budget.
Standard caster sockets: 7/16’’ x 7/8’’ 11mm x 22mm. The stability and 2200 lbs load capacity of the base will ensure the safety and durability. Customer satisfaction guaranteed - It's easy to install by following our instrction. Full size details: office chair base size in diameter: 28’’ 70 cm. Chrome base leg length: 12. 6’’ 32 cm.


5. 5 inch adjustable height office chair cylinder replacement: the height of the fully compressed gas lift cylinder is: 11. 4 inches, the fully expanded height is: 16. 9 inches, it has an adjustable height of 5. 5 inches, which allows you to rise higher and more Use office chairs in case.
The maximum weight it supports is 1000LBS, work chairs, which is much heavier than ordinary gas cylinders. The gas lift cylinder has passed sgs official test and BIFMA certification, withstand higher weight and pressure, the best quality gas lift cylinder, and is made of high-quality thickened outer steel to ensure compliance with quality standards. Therefore, if for some reason, our gas rod fails, leaks or starts to sink-send us an email and we will send you a brand new one.

Great for replacing and repairing the original swivel chair. The friction is small with noiseless function. The durability of the base will ensure your chair's base is firmly sound for many years.
Large 350 pounds Load Capacity. The seat plate has a fixed mounting hole, mounting hole distance: 102" * 6". Universal casters -- with 5 casters, the 28" diameter chair base can make the chair more stable. Height adjustable and 360° swivel -- swivel chair base replacement is equiped with standard gas cylinder, has a 5" travel from lowest to highest. Suitable for replacing your old base of office chair, done and get an updated chair.

Adjust height from 14. 5" to 18. 5". The replacement chair base is a 28" in diameter ideal for executive Tilt/Swivel style chairs.

Our office chair base is designed with low gravity and stability to make the chair safer and prevent scratches. Heavy-duty base:the heavy-duty nylon task chair base is designed with a sturdy tubular steel structure, 28in size which can withstand a weight of up to 2200 lbs, providing greater load-bearing capacity and safety 4 color cards are available for replacement.
General size: suitable for office chairs of general size on the market, the standard 2" 50mm center hole is suitable for a complete standard 2" diameter air lift cylinder, 7/16"x 7/8"11mm x 25mm The socket is suitable for ordinary casters. Save money for you:if your seat is bent, cracked or broken, please buy our durable 5-leg seat as a substitute instead of buying a new whole chair to save money.
1. MASTERY MART
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Diameter 28", Matte Black, Mastery Mart Office Chair Base Replacement Heavy Duty, 2400+Lbs, Metal Desk Chair Base Replacement Parts with Universal Gas Cylinder Hole and Casters Sockets
#adMASTERY MART #ad - More stable & safer: this office chair base with 28''71cm diameter is broader than others. 100% satisfaction guaranteed - very easy installation and replacement with our simple and clear instruction sheet. Universal size fitting: standard gas cylinder socket: 2’’ 5 cm.Both ensure the stability and safety when sitting on the chair. Heavy duty metal base: upgraded office chair base replacement from Mastery Mart is made of high-quality chrome. And the height of the base with low gravity center design is 4''10cm.
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If this doesn't fit your chair, you can simply return it for a full refund. Save on budget: it's a wise choice to buy a chair base replacement by 1/5 cost of a chair if the seat of your chair is still well. It provides greater carrying capacity up to 2400+Lbs with ANSI and BIFMA certification. Standard caster sockets: 7/16’’ x 7/8’’ 11mm x 22mm. No worries about weight 500Lbs or more. Save money and keep your favorite chair. The office chair replacement base has wide application in most types of chairs on the market like office chairs, computer chairs, gaming chairs, executive chairs and others.
Brand | MASTERY MART #ad |
Manufacturer | Mastery Mart Co., Limited #ad |
Height | 4 Inches |
Length | 28 Inches |
Weight | 6.6 Pounds |
Width | 28 Inches |
More information #ad
2. HOSALI
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Office Chair Cylinder Replacement, Universal Size Fits Most Chairs, Heavy-Duty Office Chair Replacement Parts Gas Lift Cylinder, Highest End Class 4 Hydraulic Pneumatic Shock Piston
#adHOSALI #ad - If for some reason the cylinder fails, contact our professional after-service team via email, or starts sinking, our direct after-sale team will reach out to you and timely solve your problems. Stop worrying about disturbing anyone, executive chairs, they can freely lift and rotate your office chair smoothly and quietly.Revive your chair for saving money: if your chair or stool starts sinking, our replacement chair cylinder is built to last a lifetime, leaking gas or failing, or at home, replace a gas lift cylinder instead of spending money on a brand new computer chair.
More information #ad
Please measure the dimensions before purchasing. Heavy duty class 4 piston - strongest on the market: our office chair cylinder passed the top-level test of BIFMA and TUV certification, and highest quality gas lift cylinders, the highest End Class 4 chair piston on market, longest lasting, they can lift up and down 120, which are known as the most durable, 000 times without fail and can be support up to 1000lbs. You need a chair that supports you while you're at work, without any unwanted sinking. Replace your office chair gas cylinder and stop worrying about disturbing anyone, freely lift and rotate your office chair smoothly and quietly. Your satisfaction is always our top priority. 5. 5’’ piston stroke for adjusting chair height: this desk chair cylinder extends from 285mm to 425mm 11.
Brand | HOSALI #ad |
Manufacturer | HOSALI #ad |
Part Number | occr-chrome |
More information #ad
3. MySit
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6'' x 10.2" Mounting Holes Tilt Control Mechanism, MySit Heavy Duty 500 LBs Office Chair Tilt Mechanism Replacement
#adMySit #ad - Heavy duty 500lbs - replacement office chair swivel tilt control seat mechanism rated up to 500LBs. Easy to use - twist hand wheel to tighten or loosen adjust backward tilt tension. Standard size - replacement office chair tilt mechanism with 102" long x 6" wide screw mounting holes center distance fit for most office chairs.More information #ad
The mounting holes maximum length is 104", minmum length is 9. 7". Tilt control - push lever in to lock tilt, pull out to unlock. Function - single lever for gas cylinder height activation, accepts standard 28mm inner diameter tapered gas lift cylinders.Brand | MySit #ad |
Manufacturer | MySit #ad |
Height | 1 Inches |
Length | 12 Inches |
Weight | 8 Pounds |
Width | 6 Inches |
Part Number | M3-500 |
More information #ad
4. chairpartsonline
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S2979-HD, Heavy Duty Replacement Office Chair Swivel Tilt Control Seat Mechanism w/ 6" x 10.2" Mounting Holes
#adchairpartsonline #ad - Heavy duty - rated up to 500 lbs. Heavy duty replacement office chair tilt mechanism with 102" long x 6" wide screw mounting hole pattern. Single lever for gas cylinder height activation - Accepts standard tapered gas lift cylinders.More information #ad
Tilt control - push lever in to lock tilt, pull out to unlock. Twist hand wheel to tighten or loosen adjust backward tilt tension.Brand | chairpartsonline #ad |
Manufacturer | chairpartsonline #ad |
Part Number | S2979-HD |
Model | S2979-HD |
More information #ad
5. Sytopia
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Heavy Duty Office Chair Base 28 Inch, Sytopia Office Chair Base Replacement, Chair Bottom Part2200Lbs Reinforced to Repair Chairs with Universal Caster and Gas Cylinder Size Matte Black
#adSytopia #ad - Solid base with heavy duty metal: the office chair base is made of premium chrome and meet the Office Chair's highest industry standard. You can simply return it for a full refund if it doesn't fit your chair.Affordable & universal replacement for most office chairs: The office chair base with universal caster and gas cylinder size works perfectly with almost every office chair, desk chair, gaming chair, task chair and swivel chair on the market which helps with saving your budget.
More information #ad
Height of the chrome Base: 4’’ 10 cm. Standard gas cylinder Socket: 2’’ 5 cm. What's in your package: 1 set of Office Chair Base Replacement, Installation Tools, 1 Base Cap. Standard caster sockets: 7/16’’ x 7/8’’ 11mm x 22mm. The stability and 2200 lbs load capacity of the base will ensure the safety and durability. Customer satisfaction guaranteed - It's easy to install by following our instrction. Full size details: office chair base size in diameter: 28’’ 70 cm. Chrome base leg length: 12. 6’’ 32 cm.
Brand | Sytopia #ad |
Manufacturer | Sytopia Inc. #ad |
Weight | 4.95 Pounds |
More information #ad
6. Skelang
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Office Chair Tilt Base Control Lift Mechanism, Swivel Base Plate Control Seat Mechanism, Skelang Tilt Control Mechanism Replacement, Mounting Hole Dimension: 10.2"×6"L×W
#adSkelang #ad - Application: great for replacing and repairing the original swivel chair. Make the old chair reusable and stronger. Size: the diameter of gas tube hole is 1. 57", the tilt control mechanism is 6" - 10" bolt pattern. Tilt mechanism: to adjust height of the chair, actuate the cylinder to go up and down.More information #ad
Easy assemble: with gas tube hole, suitable for replacing your old base of office chair, easy to assembly, just a few minutes, done and get an updated chair. Material: made of the 01" thicken steel bracket which is sturdy and durable for chair tilt mechanism replacing.Brand | Skelang #ad |
Manufacturer | Skelang #ad |
Part Number | SKE200709 |
More information #ad
7. Omyoffice
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Universal Size Silver, 5.5 inch Office Chair Cylinder Replacement,Heavy Duty Gas Lift Cylinder for Office Desk Chairs/Gaming Chair,Gas Lift Hydraulic/Pneumatic Piston
#adOmyoffice #ad - Universal size this air lift cylinder is suitable for almost all office chairs salon chairs, executive chairs, rolling stools on the market, and has a better load-bearing capacity. No noise to colleagues even when turning or lying on a chair to rest. Official certification durable, high safety and explosion-proof.5. 5 inch adjustable height office chair cylinder replacement: the height of the fully compressed gas lift cylinder is: 11. 4 inches, the fully expanded height is: 16. 9 inches, it has an adjustable height of 5. 5 inches, which allows you to rise higher and more Use office chairs in case.
More information #ad
180-days worry-free warranty: our goal is to provide you with the highest quality office chair accessories, thereby extending your life. Excellent alternative stable use, silent 360° rotation and aerodynamic impact, no noise, making the operation simple and smooth. The maximum weight it supports is 1000LBS, work chairs, which is much heavier than ordinary gas cylinders. The gas lift cylinder has passed sgs official test and BIFMA certification, withstand higher weight and pressure, the best quality gas lift cylinder, and is made of high-quality thickened outer steel to ensure compliance with quality standards. Therefore, if for some reason, our gas rod fails, leaks or starts to sink-send us an email and we will send you a brand new one.
Brand | Omyoffice #ad |
Manufacturer | Omyoffice #ad |
Height | 10 Inches |
Length | 13 Inches |
Weight | 2.1 Pounds |
Width | 13 Inches |
More information #ad
8. Topdeep
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Office Chair Base, Topdeep 28" Swivel Chair Base Replacement, 350 Pounds Heavy Duty Gaming Chair Replacement Base with Bottom Plate Stand Cylinder and Casters
#adTopdeep #ad - 360-degree swivel action for easy transfer. Each caster rated for up 110 lbs. The diameter of 5 casters is 60 mm. Only three steps are required to install. Heavy duty office chair swivel tilt control -- topdeep office chair replacement base is made of the 01" thicken steel bracket which is sturdy and durable for chair tilt mechanism replacing.Great for replacing and repairing the original swivel chair. The friction is small with noiseless function. The durability of the base will ensure your chair's base is firmly sound for many years.
More information #ad
The office chair base kit has universal sockets and works perfectly with almost every office chair, gaming chair, desk chair, task chair and swivel chair on the market. Easy to install -- it is extremely simple and convenient to install and operate. Large 350 pounds Load Capacity. The seat plate has a fixed mounting hole, mounting hole distance: 102" * 6". Universal casters -- with 5 casters, the 28" diameter chair base can make the chair more stable. Height adjustable and 360° swivel -- swivel chair base replacement is equiped with standard gas cylinder, has a 5" travel from lowest to highest. Suitable for replacing your old base of office chair, done and get an updated chair.
Brand | Topdeep #ad |
Manufacturer | Topdeep #ad |
Height | 19.5 Inches |
Length | 27.5 Inches |
Width | 27.5 Inches |
Part Number | CB010299 |
Model | CB012 |
More information #ad
9. SHZOND
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SHZOND 320 Pounds Replacement Office Chair Base 28 Inch Swivel Chair Base with Casters Heavy Duty Black
#adSHZOND #ad - The heavy duty chair seat plate has a mounting hole pattern of 6. 9" x 11. 1". This office chair base kit comes with all parts you need under the seat. Swiel chair base equipped with heavy duty pneumatic gas cylinder has a 5" travel from lowest to highest settings and is rated for up 320 pounds.Adjust height from 14. 5" to 18. 5". The replacement chair base is a 28" in diameter ideal for executive Tilt/Swivel style chairs.
More information #ad
Replacement office chair base with 5 wheel casters in 60mm diameter; Each caster rated for 110 lbs; Rolling caster base makes it easy to move around in your breakfast nook, kitchen, game room, or wherever you entertain. It can be adjusted to a suitable height according to your own needs. Extremely easy and convenient to install and operate. Ergonomic seating position with tilt back and swivel capabilities.Brand | SHZOND #ad |
Manufacturer | SHZOND #ad |
Height | 10.15 Inches |
Length | 28 Inches |
Weight | 13 Pounds |
Width | 28 Inches |
More information #ad
10. Omyoffice
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Gaming Chair Base Replacement with Gloves- Heavy Duty Desk Chair Base Replacement 2200lbs, Universal Caster and Gas Cylinder Size…, 28'' Office Chair Bottom Replacement
#adOmyoffice #ad - High-quality nylon material: the chair base is made of wear-resistant nylon material, it will never rust or corrode, strengthen the heat resistance of the thickened and elongated support frame and the base will ensure your chair seat is durable.Our office chair base is designed with low gravity and stability to make the chair safer and prevent scratches. Heavy-duty base:the heavy-duty nylon task chair base is designed with a sturdy tubular steel structure, 28in size which can withstand a weight of up to 2200 lbs, providing greater load-bearing capacity and safety 4 color cards are available for replacement.
More information #ad
Ensure safety & prevent scratches: improper height will cause unstable gravity and scratch the floor. General size: suitable for office chairs of general size on the market, the standard 2" 50mm center hole is suitable for a complete standard 2" diameter air lift cylinder, 7/16"x 7/8"11mm x 25mm The socket is suitable for ordinary casters. Save money for you:if your seat is bent, cracked or broken, please buy our durable 5-leg seat as a substitute instead of buying a new whole chair to save money.
Brand | Omyoffice #ad |
Manufacturer | Omyoffice #ad |
Height | 0 Inches |
Length | 0 Inches |
Width | 0 Inches |
Part Number | 0 |
More information #ad