Heavy gauge wire coiled tightly around 42 strand aircraft-type wire rope and heat treated | Cable has unequalled strength and the right amount of flexibility | One year warranty against defect or breakage | EL basin plug head allows for flexibility when maneuvering through pipes | Use down head and double down head for increased flexibility - Manufacturer: General Wire Spring.From the ManufacturerHeavy-gauge wire coiled tightly around 42-strand aircraft type wire rope and heat treated. Has unequalled strength and the right amount of flexibility.