... stamping steel tube is mainly used in Poultry feeding systems:Standard: GB, DIN, ASTM.Certification: SGS, ISO9001Surface ... Φ45mm,Φ44.5mm, Φ25mm, Φ26.7mm, Φ60mm or according customer request.Thickness: 0.9mm to 2.0mm ... or according customer request.Length: 3M, 3.04M, ... 3.05M, 4.05M, 6.07M or according customer request.Place of Origin: QINGDAO, CHINA.Supply ...