... High Density Polyethylene) and moldedin the way of co-extrusion to shape the porous structure, so it has a strong compatibility ... It can be used to protect power cable, Fiber Optic, coaxial, PCM electric cable and so on, widely apply to the telecommunication,radio, ... elasticity, good compressive strength, impact resistance anti-aging andresistant to acid bases. Both cold and hot area can use this ...