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; upgrade or replace old or damaged bulbs quickly without tools. Size: Krypton replacement bulb measures approximately 0.3 cm (0.12 inches) in length; compact design allows for easy storage. Keep out of reach of children to avoid swallowing risk. What you get: 3 pieces of 4.8-volt 0.75A bayonet base krypton flashlight bulbs; sufficient quantity for everyday 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 guide: Confirm size and part number. Open flashlight and remove old bulb. Insert new bayonet base bulb. Reassemble 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 swallowing hazard.