There are meter marks on the protect layer of duct rodder, which can be used for measuring distance. Marks are printed by professional printing machine, which has the advantage of strong adhesion, clear writing, waterproof, anti-ultraviolet, it can be still clear even after using many times.

Duct rodder/ Cobra Conduit Rod is composed of fiberglass rod which is extruded by fiber glass rod and high strength resin at high temperature.This type of rod has high tensile strength and flexibility. It is covered imported ABS engineering plastic as it protect layer,which make duct rodder cover sliding on the surface, durable, corrosion resistant and has good insulation performance.Which make them safe for use in cable pulling in the conduit. Duct rodders will equipped with different size reel according to the length of rod. There are wheels on the reel, which could make it easy to move.