1.hydraulic tubing st52 2.Specialized for 10 years 3.Certified by ISO,GL and ABS 4.MOQ for 1 pc 5.Heat treatment: N+Q+T 1.Features: hydraulic tubing st52 2.Standard: ASME,ASTM,GB,JIS,DIN3.Certificates: ISO,GL and ABS4.MIn order:for 1 Pc5.Materials: Alloy steel,stainless steel and carbon steel.6.Competitive price and best Quality hydraulic tubing st52