Go Power! GP-CEP Cable Entry Plate for MC4 Solar Cables Perfect companion to making a cleaner RV solar installation Waterproof MC4 cable glands (IP68 rated) come pre-installed and tightened to the correct torque Tough, UV-resistant polycarbonate plate able to absorb impact energy without cracking, even at low temperatures -40F to 170F (-40C to 80C) Molded-in rings seal against the underside of the screw heads Inside jam-nut thread locked for vibration resistance