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; allows convenient removal and replacement of old or damaged bulbs without extensive time or effort Size: Krypton replacement bulb measures approximately 0.3 cm (0.12 inches) in length; compact design allows for easy storage without occupying significant space; keep out of reach of children to avoid choking hazard What you get: Package includes 3 krypton flashlight bulb replacements; sufficient quantity for regular use and replacements; please verify size and part number before purchase 3 Pieces 4.8-Volt 0.75A bayonet base krypton replacement bulb for flashlight applications Specifications: Material: Glass, metal Part number: 41-1660 Length: Approx. 0.3 cm (0.12 inches) Installation guide: Confirm correct size and part number Open the flashlight and remove the old bulb Insert the new bayonet base replacement bulb Reassemble the flashlight Package includes: 3 x 3D (4D) 4.8-Volt 0.75A bayonet base flashlight bulbs Note: Slight measurement variations may occur due to manual measuring Keep away from children to prevent choking risk