There is copper wire inside for tracing easily. Polyethylene cover: Medium density polyethylene resin for the insulating and jacketing of cables. Rolling bearing cage flotation (reel transport) for mobility should be light and easy to use in the field, including a parking brake for the flexible rod. Feed device allows rod to feed out or be back with easy push or pull of rod Rugged tubular steel reel with adjustable positioning Rustproof bull-nose pulling eye for longer conduit run and underground duct Constructed of fiberglass reinforced in the center and consists of a rugged plastic layer that would ensure the lifetime of the flexible rod