... Chinese factory.We can make all kinds of plastic injection pipe fitting PPR union connector.In China, we are ... thread sample.The followin is the socket sample.Go to our sample room: http://www.valvemolds.comWe can ... thread, socket, male, female, etc.4. We devote to be your one-stop service from raw material supply ... , MAX, temper ture, connection, certification, ISO, API, ISA, specification, type, etc.