Home default The inner and outer layers are made of Polymer (PE,PVC,PA,PU etc), and the middle layer is mainly made of fiber braiding reinforced net. The inner and outer layers are made of Polymer (PE,PVC,PA,PU etc), and the middle layer is mainly made of fiber braiding reinforced net. Pvc Pipe February 25, 2019 Share: Facebook Twitter Pinterest The inner and outer layers are made of Polymer (PE,PVC,PA,PU etc), and the middle layer is mainly made of fiber braiding reinforced net. ... Click to read more