Stab-o-mat Replacement Gas Lift Cylinder: High Precision, Heavy Duty - Fits Perfect with Aeron - Universal Size Fit All 350 lbs max loading, 5-Year Seller's Warranty Polished Stainless Steel Anti-shock system Hi-end gas-spring from Stabilus, the Mercedes-benz supplier Replace the gas lift on your office chair with this durable, reliable Stab-o-Mat high precision gas lift cylinder. Its universal size fits virtually all office chairs for added convenience.