Our products are made up of four main kinds of fittings, which are soldering joint copper fittings, solder ring copper fittings, air-conditioner copper fittings, Adapter. ..All the products are manufactured conforming to relevant products standards as follows: ..1 American standard ANSI/ASME B16.22-2001 and Japanese standard JISH3401. ..2 European standards: European Community's standard EN1254-1, British standard BS864-2 ..and German standard DIN2856. ..3 Chinese Standard CJ/T 1172000. ..Integrated specifications of copper fittings are manufactured for you. Copper fittings, with size from 1/4" to 4", could be provided in accordance with American and Japanese standards, as well as those fittings with size from 6mm to 108mm being provided in accordance with European and Chinese standards