... ,ductile iron,steel,PVC,and copper pipes.The universal straight coupling details as follows.USE:1.For water and sewage applications ... .(150 microns )3.Rubber seals Water:EPDM4.Nuts SS 316,PTFE coated5.Washers SS 3166.Bolts SS3 16, PTFE coateSIZE: Pipe DN40 ... 0411-82530206 M.P: +86 15940998921 Skype:kingliuw pipe sleeve coupling