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 Fiber-Optic Cable. The lubricant layer is clearly visible in cross section, concentric with the outer layer. The ducts contain 4 (four) eqvi-spaced 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.