... ,120,000 times quality guarantee 3,when it locked,it'll not bounce 1,we are the leading manufacture of gas spring . Beacuse ... have years' expricence. Many series of gas spring, including cars spare parts, lift gas spring,,medical gas spring ,machinery gas spring and so on.2,We are ... ROHS test; 4,When the gas spring is up and down, it's soomth opration without noise. 5,Safe and easy installation. 6 ...