The body of the accessories is manufactured in PDFV (polypropylene with glass Fibre). These products are suitable for tubes 4-6-10-16 bar pressure LDPE (low density polyethylene). The different threads, male and female, are prepared for accessories with qppropriate measures with threads in PP (polypropylene). It is recommended that the tube has a clean cut and homogeneous. Do not flatten the tube. With these factors met guarantee fast mounting and obtaining a perfect connection.