1,Lockable gas spring for Sofa, Medicidal bed,seats. 2,chair seat gas spring 3 rigid locking 4. High quality ... manufacture of gas spring ,This kind of lockable gas spring is widely used in chair ,carbinet ,table,sofa,medical , ... forward to cooperate with you .Specifications:sofa gas spring1. Spec.: Picture for reference. will make as per your ... price with good services. lockable gas spring for furniture