1,Lockable gas spring for Sofa, Medicidal bed,seats. 2,chair seat gas spring 3 rigid locking 4. High quality & fast delivery 1.We are the leading manufacture of gas spring ,This kind of lockable gas spring is widely used in chair ,carbinet ,table,sofa,medical ,it make user to adjust the angle as convenient as desired .2.We can supply the goods as you drawing and design .3.Our goods of highly ...