Fiberglass hose is lightweight and non-conductive, because of the extreme flexibility, it can be used as push-pull rodder in cable installation, and in conduit which makes it very versatile Category : Insulation Materials & Elements, Power Accessories, Power Distribution Equipment, Transformers, Communication Cables, Computer Cables& Connectors, Connectors and Terminals, Instrumentation Cables, Power Cables The D4 D7mm fiberglass-reinforced composite core is jacketed in a rugged plastic coating to ensure l1/4' to 5/16" rod long life and superior flexibility and no splintering. It has a bullnose at each end so wires can be pulled from either direction. The D11,D12,D13 rods, Comes in a steel cage with a hand operated brake. It has a bullnose at end. Fiberglass push pull/fiber snake duct rodder/cable rods/fiberglass hose rods can be make as your desired diamter .