• Universal Inner and Outer Diameter: Outer Steel: 2 inches (5.0cm), Inner steel:1.1 inches (2.8cm). Replacement Pneumatic shock is applicable for 2 inches (50mm) diameter center hole base. Ideal for high stools,drafting chairs,Bar stools and task chairs
• 10” Piston Stroke: Initial length:18 inches (45cm); Fully extension length: 28inches (71cm),which means the hydraulic lift has a height range of 10 inches. You can adjust the chair to a very comfortable sitting height
• Smooth operation and Noiseless: Make your lovely chair or stool rise and fall smoothly, and supports 360 degrees of rotation noiselessly
• Study & Heavy Duty Class 3 Gas Lift Cylinder: Certified by SGS (ANSI/BIFMA X5.1) & TUV(Higher Standard LGA), use high quality materials and stronger inner and outer steel, higher quality and durability than the class 1 and 2 gas rods,supports weight capacity 450 lbs. and at least 5 years service life
• 5 Year replaceable: You get a replacement for any non-human quality problem within 5 years. We are dedicated to providing 100% customer satisfaction
• Chair replacement parts: This gas lift cylinder is suitable for most bar stool, counter height stool, drafting chair, high stool chair, so it is not suitable for common office chair and regular stool (Please measure dimensions before you purchase it )