Blue Diamond Industries is a premier manufacturer of HDPE (High Density Polyethylene) conduit and microduct for the protection of fiber optic cables. Sizes included are from 1” – 6” in a variety of colors and striping combinations. Other options include pre-lubrication, pre-installed pull tape, pre-installed cable in conduit and toneable wire. Blue Diamond complies with RUS/USDA standards, meets Buy America Requirements and all national specifications including ASTM, NEMA and UL.