cold draw seamless steel pipe for hydraulic pressure cylinder are widely used in the fields: hydraulic pressure cylinder cylinder, stustain columniation in coal mine, engineering machine purchase transport, cars transmission shaft, plastics machine etc. processing :cold draw dia 30-250mm length : shorter than 10 meter linearity:0.3-1.0/1000 dimmesion accuracy:H9-H11 socket rough:0.8-1.6 processing :grind dia 40-400mm length : shorter than 10 meter linearity:0.3-1.0/1000 dimmesion accuracy:H7-H9 socket rough:0.4-0.8 steel grde:AISI1020, AISI1045 AISI1320 16Mn 27SiMn etc We also could mnufacture : Outer-dia 6-180mm length 600-9000mm exactitude thin-long shaft, Piston pole, These products are widely used in the fields :hydraulic pressure vat, cylinder, shock absorber, weave printing and dyeing, printing machines pole, diecasting machine, plastic-injest pole and four-pole press machine ,fax, duplicating machine , high-speed mimegraph printer etc.