Part number: 41-1660; Performance: krypton flashlight bulb can produce 4.8 volts at 0.75 amps, emitting bright light to meet daily lighting needsCompatibility: the replacement bulb works well for 3D lights (or 4D lights), the quality glass and metal material allow them work for a long timeEasy installation: the flashlight bulbs are easy to install and remove, you can conveniently replace the old or broken bulbs on your flashlight without taking much timeSize: krypton replacement bulb is about 0.3 cm/ 0.12 inches in length, small and easy to store, won't take too much space in your home, but please keep them away from little kids to avoid swallowing riskWhat you get: you will get 3 pieces of flashlight bulb replacements, enough quantity for your daily use and change; Warm note: please ensures the size before purchasing3 Pieces 6-volt/ 4D-4.8-volt 0.75a bayonet base krypton replacement bulb flashlight bulbsSpecifications:Material: glass, metalPart number: 41-1660Length: approx. 0.3 cm/ 0.12 inchesEasy to install:Check the size and part number firstOpen your flashlights and take out the old broken bulbsInstall our bayonet base replacement bulb inFinally assemble your flashlightsPackage includes:3 x 3D(4D)-4.8-Volt 0.75A bayonet base flashlight bulbNote:Please allow slight size errors due to manual measurement.Please keep the flashlight bulbs away from little kids to avoid swallowing risk.