BERLIA PLB Duct, or Permanently Lubricated Duct, is a type of duct made from High-Density Polyethylene (HDPE) and is widely used for the underground laying of cables. Here are some key points about PLB Duct: Material: PLB Ducts are made from HDPE, which offers high flow capacity. Usage: These ducts are primarily used for laying Optical Fiber Cable (OFC) as underground conduits. They are also used for telecom cables, electrical cables, etc. Lubrication: The inner side of the PLB Duct is lubricated with an additional additive for permanent lubrication. This reduces the internal coefficient of friction (IFC), making the installation of cables easier and faster. Durability: PLB Ducts are known for their high impact resistance, environmental stress crack resistance, and flexibility. They can withstand all weather conditions and temperatures. Sizes: PLB Ducts are available in various sizes. For example, 32/26 mm, 40/33 mm, and 50/42 mm are some common sizes. Please note that the specifications can vary based on the manufacturer and the specific requirements of the application. www.berliapipes.com