... SGS test 2.100000 times fatigue test 3.Surface:Black,Chrome 4.free sample 1.Gas Lift,Gas Spring ,Gas Cylinder,Gas ... Strut for Office Chair,Bar Stool,Table 2. Stroke(mm): 80, ... 100,120,140,160,230,260,3303. Surface: Black,Chrome 4. Standard ... . gas spring or gas cylinder for Office Chair and bar chair