Dual Fuel level Plotted dial E - 34 ohm, 1/4 - 94 ohm, 1/2 - 135 ohm, 3/4 - 193 ohm, F - 240 ohm, with red band E - 1/8,  2 1/4" square, Works on 12 or 24 volt systems.  
12 volt Light kit 186-12A2 sold separately