Honed Tubing, Hydraulic Cylinder, Bore Tube manufacturer / supplier in China, offering New Hot Selling Precision DIN2391 1020 St45 Honed Tube for Hydraulic Cylinder Parts, Ck45 1045 Raw Material F7 F8 Chrome-Plated Hollow Rod or Shaft, SAE1045 Hard Chrome Plated Steel Piston Rod and Shaft and so on.