... 1,Lockable gas spring for Sofa, Medicidal bed,seats. 2,chair seat gas spring 3 rigid locking 4. High quality & fast ... kind of lockable gas spring is widely used in chair ,carbinet ,table,sofa,medical ,it make user to ... -10003102640235300-10004102670300300-100051026100285300-100061028255620300-120071228255620300-20003. Usage:office chair,sofa ,auto seats, hospital beds, coach seat back4. Features:1) ...