Voltage 6, Wattage 15, Shape T6, Overall Length (mm) 53, BRS-0040208803, 6V-15W-DC BAY-SPEC Ring, Manufacturer: Rodenstock Rodenstock - Slit Lamp Refractometer - 70505 Replacement Light Bulb - Equipment to Lamp - BRS-0040208803 - 6V-15W-DC BAY-SPEC Ring - Manufacturer: Rodenstock