Voltage 2.5, Base 1 PIN, Shape T1.5, Overall Length (mm) 15, 2.5V CLEAR, 11.405, Manufacturer: American Optical Reichert/American Optical - 11414BH Opthalmoscope - 11.405 Replacement Light Bulb - Equipment to Lamp -2.5V CLEAR - 11.405 - Manufacturer: American Optical