PLB HDPE duct consists of two concentric layers, the outer layer being HDPE; co-extruded with an inner layer of solid silicone permanent lubricant, to reduce the internal co-efficient of friction (ICF). We are manufacturing in such a manner so that the lubricant shall become a solid layer of uniform thickness throughout the duct so formulated to provide a permanent, low friction boundary layer between the inner surface of the duct and Optic Fiber Cable. The lubricant layer is clearly visible in cross section, concentric with the outer layer. The ducts contain 4 (four) equispaced continuous longitudinal strips of width 3mm minimum which is co-extruded during the duct manufacturing. 

Alternatively the ducts can also be manufactured in homogenous construction (without a separate inner layer) with inside containing smooth lubricants for easy and convenient pulling of cables meeting all the generic requirements.