... 1000 UsageApplicable to hydraulic pressure, pneumatic cylinder,oil pump barrel, motor body, transmission shaft, etc.Quality Standard DIN 239, EN ... 10305 and ASTM A519 ProcessRaw materials- Cold drawn/rolled- Heat treatment(BKS ... Test, Impact Test etc), Exterior Size InspectionSKYPE: samsonhuang22 honed tubes for hydraulic and pneumatic cylinder