... of waterproof. 4.Good corrosion resistance. 5.fibre optic pipe. HDPE silicon core pipe is a ... different extruders. The product is widely used in protecting sleeve pipe for optical cable of express ... of few joints, it can be laid in succession in long distance, so the construction speed is ... quick and easy.Its Spec. include 21,25,32,40,50,60mm. Fibre ...