... ,pls let us know the parameters .specifications:Usage: tool box,machinery,shopping cart.Features: 1, Gas: Nitrogen filled inside. ... as clients request. 3,Quality: We can provide fatigue test report. Our products can open and close 100,000 ... times, Not leak oil; Our paint is passed ROHS test; 4,When the gas spring is up and down, ... forwarder. high quality gas spring for machinery,tool box,shopping cart