ELBOW: CARBON STEEL, STAINLESS STEEL OR ALLOY STEEL DN OD 45DEG 90DEG 180DEG SERIES A SERIES B L/R L/R S/R L/R S/R 15-2000 21.3-2020 18-1220 16-1263 38-3048 25-2032 76-1524 51-1016 MATERIAL:A234 WPB GR B16.9, A283,A105,A53,A106,API5L STANDARD: ASTM/ANSI,DIN,ISO,GB.JIS,BS. THICKNESS: SCH20,STD,SCH40,SCH80,SCH160,XS,XXS OR ESPECIAL