... ,This lockable gas spring has been widely used machine,chair 2,high quality 3,reasonable price 1,This lockable ... rigid when it locked ,not bounce up and down.2,Body: powder coated steel or electroplate coated steel. ... Usage: Toyota automobile.Features: 1, Gas: Nitrogen filled inside. 2, Color : black,silver,or as clients request. 3,Quality: ... your appionted forwarder. Lockable gas spring for machine