1).High quanlity 2).Competitive pricing 3).With SGS,ROHS 4) 100,000 times Warranty 5)MOQ:500PCS ... want ,pls let us know the parameters .specifications:Usage: tool box,machinery,shopping cart.Features: 1, Gas: Nitrogen filled inside. 2, Color ... accept your appionted forwarder. high quality gas spring for machinery,tool box,shopping cart