Standard: ANSI B16. 9/16. 28, DIN 2605/2615/2616, JIS P2311/2312, Size: 1/2”-48” Schedules: SCH20, STD, SCH40, SCH80, SCH160 Material: ASTM A234WPB, St37, Carbon steel, Alloy steel, stainless steel Surface: anti rust black painted, anti rust oil, galvanizing