ASTM,B88,EU STANDARD 90 Degree Copper Elbow Fittings Material: 99.99% copper ISO9001:2008 ASTM,B88,EU STANDARD 90 Degree Copper Elbow Fittings90 Degree Copper Elbow Fittings with ASTM B88,EU,America ... etc.5),More than 10 year's experience in line. Copper elbow, copper fitting is made by cold extrusion,and its feature as heat ...