• Small design allows for mounting in various locations. • Easy to install – only requires standard hole saw to make 2-3/8” hole and drill two holes for the mounting screws. • Each unit comes with watertight gasket. • NMMA listed and surpasses the USCG and ABYC A-23 standards. • Separate Stainless steel cover available. • Dimensions:Oval 4.92” x 3.11”