For special applications, this 15-ft product is a supplement to other fish tapes. The difference is the miniature tip that has a diameter of 3/16" to match the accessories for the push/pull rods.
Mini tip can penetrate areas the standard 1/4 inch tip can't (fully loaded conduit or any small diameter opening).
Non-conductive polypropylene coated fiberglass won't rust of corrode as with metal fish. Suitable for carrying in a briefcase.