... ,easy&safe install 4,high quality 1,this electroplate gas spring has simple frame ,convenient instal and maintance ,long life span ... forward to cooperating with you and your .if you want ,pls let us know the parameters .specifications:Usage: machinery,billbroad,tool boxFeatures ... ; Our paint is passed ROHS test; 4,When the gas spring is up and down, it's soomth opration without noise ...