1,This lockable gas spring has been widely used machine,chair 2,high quality 3,reasonable price 1,This lockable gas spring has a ... us know the parameters .specifications:Usage: Toyota automobile.Features: 1, Gas: Nitrogen filled inside. 2, Color : black,silver,or as clients ... oil; Our paint is passed ROHS test; 4,When the gas spring is up and down, it's soomth opration without ...