1.Gas Spring,Lift,Cylinder,Strut for Chair,Table 2.Black ,chrome Surface 3. ... 4.ISO9001 Certificate 5.OEM Service 1. Gas Spring / Gas Lift / Gas Cylinder / Gas Strut for Office Chair / Bar Stool / Table2 ... . SGS BIFMA X5.1(100,000 Times Testing)6. Pressure(N): 300--4507.Button Color: White/Black/Orange/Blue/Gray/Green8 ...