1.Name:Gas Spring / Gas Lift / Gas Cylinder / Gas Strut for Office Chair parts / chair hardware 2. Stroke(mm): 80 / 100 / 120 / 140 / 160 / 230 / 260 / 330,Etc. 3. Surface: Black / Chrome 4. Standard: Class 2 / Class 3 / Class 4 5. SGS BIFMA X5.1(100,000 Times Testing 6, Pressure(N): 300--450 7, Bottom Color: White/Black/Orange/Blue/Gray/Green 8, Warranty: 5 years 9. OEM Service/ ISO9001 Certificate.
