Material: 100% new material of PP-R Size: full 20mm through 63mm availability Standard: ISO CE Colors:GREEN OR WHITE •Other colors are also available upon request. Form Supplied: •have lots of availbale size and model •Other forms are also available upon request. •Union PPR are used to weld 2 pipes togetherPPR union is a kind of fitting for ppr pipe connection. It uses welding machine to connect two pipes together. It can be quickly connected and disassembled, and it is very convenient to use. If the two ends of the pipe are fixed and there is a little distance between them, then you can choose to use a union, saving cost and time, and at the same time, the appearance is very beautiful.