The Welch Allyn 03100 BulbEquivalent is a replacement lamp suited for the following 3.5v instruments:

• Otoscopes: 20000, 25020, 21700, 20200, 20202
• Tongue Blade Holder: 28100
• Illuminators/Transilluminators: 27000, 27050, 26530, 41100, 43300
• 3.5v Rectal Handle Adaptor: 73500

This bulb is made with halogen,which gives a whiter, brighter longer lasting light.