Dimensions: the ultra-stable gas lift for office chairs has an adjustable stroke of 350 mm - 550 mm, a retractable stroke of 200 mm, a thick tube length of 300 mm, a diameter of 50 mm and a thickened wall of 2 mm. Some of the chair rods may be rusty, add a little rust remover, you can easily remove and install a new gas pressure rod. The gas pressure rod is quiet and can be smoothly swivelled 360°. Gas Lift Office Chairs - Quantity of 4 - Asstd. Styles Gas Lift Office Chairs - Quantity of 4 - Asstd. Styles PROFESSIONAL GRADE 4 STANDARD Heavy duty gas springs manufactured to the highest industry standards (TÜV/SGS/BIFMA) with QPQ process, hardened at high temperatures and explosion-proof for maximum safety. Made of thick alloy steel, durable and corrosion resistant, the maximum load capacity is up to 500 kg. You can use it to replace gaming chairs, office chairs, executive chairs and more. 1 200mm Stroke 2 All sizes The height adjustment is more stable and there are no irregularities in height or wobble during use. 80mm SGS BIFMA Standard Office Chair Gas Spring Cylinder - Office Chair... COMPATIBILITY WEWILL spring loaded pneumatic levers are suitable for most chairs, but are not compatible with 1KEA and t0pstar office chairs. Office Chair Gas Lift WEWILL Gas Spring For Office Chairs, Gas Pressure Spring, Office Chair 50mm Diameter Gas Pressure Damper