... pricing 3).With SGS,ROHS 4) 100,000 times Warranty 5)MOQ:500PCS 1,Many different specifications of gas spring,we ... know the parameters .specifications:Usage: tool box,machinery,shopping cart.Features: 1, Gas: Nitrogen filled inside. 2, Color : black,silver,or as clients ... is up and down, it's soomth opration without noise. 5,Safe and easy installation. 6,Resonable price, excellent quality,delivery ...