2-wire ConnectPro plug uses o-ring seal for waterproof connections. Weather resistant plug cover. Ergonomic contoured grip for easy hook-up and ground blade alignment. 2-wire ConnectPro Receptacle works with 12, 24 or 36 volt 2-wire systems. For front mount panel installations. Weather resistant sealing cap. Fits standard 1-1/8" diameter mounting hole. Both plug and receptacle use corrosion resistant, plated brass electrical components and accept up to a 10 gauge wire.