Diagnostic Instrument Replacement Bulb Welch Allyn® Halogen 3.5 Volt #03100-U6Features Pack of 6 lamps Welch Allyn 3. 5 V Halogen HPX Lamp for Otoscopes (#20000, #20200, #20202, #21700, #25000, #25020, #25200), Illuminators and Transilluminators (#26530, #26538, #27000, #27050, #41100, #43300), Tongue Blade Holder (#28100), and 3. 5 V Handle Adapter (#73500) UOM 1 Each 6 Per Box Product Specifications McKesson # 875386 Manufacturer # 03100 U6 Brand Welch Allyn Manufacturer Welch Allyn Country of Origin Unknown Application