Copper return bend is used for air conditioner coils like condenser, evaporator, heat exchanger, processing in copper alloy cu 99.90% above, brazing rings Ag 2% available, regular sizes for diameter 7mm, 5/16″, 3/8″, 1/2″ and 5/8″ copper tube, our capacity for 1,500,000 nos per month, packing in poly bags and box, OEM draiwng request available. Aditionally, copper return bends are applicated for plumbing too, made according to ASTM B16.22 or EN 1254-1 standard, regular ranges for 3/16″ to 8 1/8″.