... swich on and off.7. Back support/ Back frame: Carbon fiber material, flame resitance, strong and light, with foam cushion, ... fastened12. Air cylinder: Aluminum cylinder insize and wraped with carbon fiber, 30Mpa working pressure, light and strong, with high pressure safety ... . Technical Data:Model: RHZK 5L/6L/6.8Aluminum+Carbon Fiber CylinderWorking Prssure(Mpa): 30Cylinder Volume(L):6.8Air Deposit(L ...