... ISO9001:2008 ASTM,B88,EU STANDARD 90 Degree Copper Elbow Fittings90 Degree Copper Elbow Fittings with ASTM B88,EU,America ... : 99.99% copper ASTM,B88,EU STANDARD 90 Degree Copper Elbow Fittings Material: 99.99% copper National standard, ... than 10 year's experience in line. Copper elbow, copper fitting is made by cold extrusion,and ... 16.22 standard. ASTM,B88,EU STANDARD 90 Degree Copper Elbow Fittings