Part number: 41-1660; Performance: Krypton flashlight bulb produces 4.8 volts at 0.75 amps, emitting bright light for daily lighting needs Compatibility: Replacement bulb is suitable for 3D and 4D lights; constructed with quality glass and metal materials for long-term performance Easy installation: Flashlight bulbs are simple to install and replace; compatible with standard bayonet base flashlights for quick bulb replacement Size: Krypton replacement bulb measures approximately 0.3 cm (0.12 inches) in length; compact design allows for easy storage What you get: 3 pieces of 4.8-volt 0.75A bayonet base krypton flashlight bulbs; sufficient quantity for everyday use Specifications: Material: Glass, metal Part number: 41-1660 Length: Approx. 0.3 cm (0.12 inches) Installation guide: Verify the size and part number before installation Open the flashlight and remove the old bulb Insert the new bayonet base bulb Reassemble the flashlight Package includes: 3 x 3D (4D)-4.8-Volt 0.75A bayonet base flashlight bulbs Note: Slight size variations may occur due to manual measurement Keep out of reach of children to prevent choking hazard