U-Bend Tubes Main Grades:TP304/304L/304H; 321/321H; 316/316L/316H; 316Ti; 317L; 347H; 310S; UNS S31803; UNS S32750 Main Standards:ASTM A213/213M;ASTM A269/269M; ASTM A789;ASTM A790; EN10216-5 Size: a) OD: 12.7mm - 50.8mm (1/2" - 2")      &