Hydraulic and vibration dampers 1).High quanlity 2).With ISO9001,SGS,ROHS 3 ... .CertificationISO9001:2008, ROSH, SGS, (Fatigue Testing, Low & High Temperature Test, environmental test, ect )TypeCabinet gas spring, bed gas lift, Auto gas spring ... for you to test ,if you have any questions , pls feel free to contact with me .Usage: Hydraulic and vibration dampers (manufacturer)