PVC pipes used for protection of telephone and electrical power cables are made of hard PVC, in DN 50, 75 and 10 mm diameters. The pipes are made in either yellow or red colour, supplied in rods of 4 m or 6 m length, or to the customer’s requirements. The pipes are produced with a socket on one end, used for connections. All of the accessory components that are used in laying the PVC pipes are also produced, including PVC plug, PVC insertion, PVC comb and PVC shield. The production and quality control are in accordance with: Technical Conditions regulating PVC pipes for cable-type sewage, “PTT Vesnik” No. 6/73.