Lamp For Microscope Illuminator, 19 Volts, T5 Shape, G5 (Miniature Bi-Pin) Base, Bulb Only, Feet Are 12mm Apart, Ring Light, 2 Pins Each Leg, View White, 72mm Diameter (Measured From Center Of Tube To Center Of Tube), 5 1/6" (130mm) MOL, 3 5/16" (84mm) Overall Diameter