... if you want ,pls let us know the parameters .specifications:Usage: tool box,machinery,shopping cart.Features: 1, Gas: Nitrogen filled inside ... oil; Our paint is passed ROHS test; 4,When the gas spring is up and down, it's soomth ... . 7,MOQ: 500PCS.Packing: Standard export packing or as the request.Delivery term: FOB & Western Union& Exw. 7 ... . high quality gas spring for machinery,tool box,shopping cart