Blue Seas 9003E 9003e e-Series Battery Switch Single Circuit . ON/OFF. Ignition protected - Safe for installation aboard gasoline powered boats. Case design allows surface or rear panel mounting. 3/8-16 tin-plated copper studs for maximum conductivity and corrosion resistance, accepts 3/8 and M10 ring terminals. Tactile textures indicate knob position by feel only. Weight - 1.30 LB (0.59 kg)