Part number: 41-1660; Performance: Krypton flashlight bulb produces 4.8 volts at 0.75 amps, emitting bright light for everyday lighting needs. Compatibility: Replacement bulb is suitable for 3D and 4D lights; constructed with quality glass and metal materials for long-lasting performance. Easy installation: Flashlight bulbs are simple to install and replace, allowing quick removal of old or damaged bulbs without hassle. Size: Krypton replacement bulb measures approximately 0.3 cm (0.12 inches) in length, compact and easy to store without occupying much space. Keep out of reach of children to avoid potential choking hazard. What you get: 3 pieces of flashlight bulb replacements, sufficient for regular use and replacements. Please verify size and part number before purchase. 3 Pieces 6-volt / 4D-4.8-volt 0.75a bayonet base krypton replacement bulb flashlight bulbs. Specifications: Material: Glass, metal. Part number: 41-1660. Length: Approx. 0.3 cm (0.12 inches). Installation instructions: 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 size variations may occur due to manual measurement. Keep away from children to prevent choking hazard.