Welch Allyn 3.5V Fiber Optic Transilluminators Each 41100 by Welch Allyn GROUP: Equipment & Furniture:Lighting:Specialty Item Description: 3.5V Finnoff Transilluminator (Cobalt Blue Filter Optional 41102) Packaging Desc: Transilluminator 3.5V Finnoffhalogen Hpx Lamp Country of Origin: Harmonized Tariff Code: Product Description: These instruments use halogen illumination transmitted through fiber optics for brilliant, yet cool illumination. Fits any Welch Allyn 3.5V power source. May be sterilized by steam, gas, or some germicidal solutions.