Feature Constructed of fiberglass reinforced in the center and consists of a rugged plastic layer that would ensure the lifetime of the flexible rod.Assembly: metal frame and rubber wheels, Wheel assembly for easy transportation; Guide rollers and the right parts for rotary coupling; parking brake for the flexible rod.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.