PROFECTUS Office Chair Cylinder Replacement – Class 4 Heavy Duty Gas Lift Piston, 1000 lbs Support, 5.5" Height Adjustable, Silent 360° Rotation, Universal Size Fits Most Chairs

How to install1.Tip the chair onto its side.2.Use the rubber mallet to tap and remove the base of the chair away from the seat.3.Use the pipe wrench to clamp tightly onto the top of the cylinder. Twist and then pull up in order to remove the cylinder.4.Remove the orange cap of the new cylinder. Insert the bottom of the cylinder into the center of the chair base.5.Carefully lift both the chair base and the chair cylinder into the chair mechanism. The parts will then fasten on their own.FeaturesHeavy duty gas lift cylinder.Made of the highest quality materials available.Durable and resistant to the greatest weights.The best choice for adults, children and anyone in the family.SpecificationsMaterial: 45# SteelColor: BlackOuter cylinder diameter: 2"Inner cylinder diameter: 1.1"Minimum length: 8.5"Fully extended length: 12.5"Adjustable range: 5"Package Included1x Silver Chair Gas Lift Cylinder

• 【Class 4 Heavy-Duty Cylinder – SGS & BIFMA Certified】 Built with premium 45# steel and Class 4 construction. Passed 100,000+ stress and impact tests. Supports up to 1000 lbs for lasting safety and strength.
• 【Universal Fit for 99% Office Chairs】 Outer diameter: 2" (50mm), inner diameter: 1.1" (28mm). Compatible with most brands of office, task, and executive chairs. Easy plug-in replacement—no tools required.
• 【Smooth & Silent 360° Movement】 Enjoy frictionless rotation without squeaks or noise. Ideal for shared offices or home setups requiring silence and smooth adjustability.
• 【5" Adjustable Height Range】 Extendable from 8.5" to 13.5", offering a total 5" stroke. Perfect for tall users or high-desking setups. More lift, better posture, enhanced comfort.
• 【Reliable Quality – US-Based Support】 Every unit is pressure-tested before shipping. PROFECTUS stands behind every piston with responsive, no-hassle US-based customer service.