... (12/10mm) which are made of HDPE, high density polyethylene that with a ribbed or smooth low ... outer sheath3.Technical SpecificationConstruction detailsA. Primary duct MaterialHDPE, high density polyethyleneColourred, white, green, blue and other colours for ... [mm]12Inner diameter [mm]10B. Sheath MaterialHDPE, high density polyethyleneColour Red or other colours which requested by customersDiameter ...