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Composite and solid copper alloy flanges are used in water, gas and sanitary applications, for connecting copper tubes. Made to BS2871 and BS EN 1057. Please click on DATA below for all details DATAPlease note bolts are not included, must be purchased separately. The following sizes are not kept in stock so please allow at least 48 hours for delivery, 133mm, 159mm and 219mm.. JTM PN16 4-Hole Bi-Metallic Brazing Flange - 22mm Composite Copper Alloy BI-MET02