What is Gas lift class & base?
Class 3/4 certified hydraulic cylinder and nylon vs metal base.
Short answer
Ask for Class 4 gas lift and the weight rating.
Gas lift class & base when buying a office & study chair
Class 3/4 certified hydraulic cylinder and nylon vs metal base.
Why it matters: Cheap cylinders sink slowly within a year; metal bases handle more weight.
Look for: Ask for Class 4 gas lift and the weight rating.
Full Office & Study Chair buying guide