... Color : black,silver,or as clients request. 3,Quality: We can provide fatigue test report. Our products ... test; 4,When the gas spring is up and down, it's soomth opration without noise ... Safe and easy installation. 6,Resonable price, excellent quality,delivery soon,good service. 7,MOQ: 500PCS.Packing ... We can accept your appionted forwarder. high quality gas spring for machinery,tool box,shopping cart