... , hydraulic cylinder, shock absorber, motorcycle front fork,hydraulic machine precision seamless pipe Specifications:1. Main application: widely used in automobiles, motorcycles, machine ... inside and outside face, smooth 3. Standard: DIN2391,ASTM A5194. Steel grade: 10#, 20#, 35#, 45#, 40Cr, 37Mn5, 20Cr, ST35,ST37 ... cover with bags or in carton box Cold Rolled Precision Seamless Steel tube