1.SIZE :From 1/2 to 48 (Seamless pipe fittings) From 26 to 72 (Seam pipe fittings) 2.STANDARD: AMSE,JIS ,DIN,GB 90 degree elbow1.SIZE :From 1/2 to 48 (Seamless pipe fittings). From 26 to 72 (Seam pipe fittings)2.STANDARD: AMSE,JIS ,DIN,GB3.MATERIAL: ASTM A234 WPB, A420 WPL3/L6 etc4.WALL THICKNESS : SCH10 to SCHXXS 90 elbow