... 20mm~100mm 4) packing material NBR/FPM HRPC brand hydraulic doubling acting compact cylinder 1) type:doubling acting2) inner/external thread3 ... HRPC company is a china manufacturer of hydraulic components, our products include:hydraulic ball valves, high pressure ball valves, ... steel ball valve, carbon steel ball valve, oil cylinders, multi-stage cylinders, ect.Besides, we also can produce or develop ...