Drilling a hole to pass an antenna cable through a rooftop or transom can allow water to pass through if not properly sealed. CableClams provide a waterproof pass-through for antenna, transducer, and other cables without removal of the factory installed cable connector. Blue Sea Systems now offers updated versions of these popular products including the addition of five new models. New models include a side entry clam as well as versions with 316 stainless steel caps and pre-drilled rubber inserts.