... Waist Belt: Fasten with buckle, length adjustable.4. Fast tube connector: Small size, may be assembled with one hand, anti-loose ... 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 ...