Looking for Microscope Accessories? UNICO Halogen Bulb, 6V/20W, 4mm Pin, 5 Pack 7006-5 delivers great quality for a great price. All of the features you need for a price you want from UNICO. Don"t look further for Microscope Accessories. UNICO Halogen Bulb, 6V/20W, 4mm Pin, 5 Pack 7006-5 has everything you"ve been looking for.