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-lasting performance. Easy installation: Flashlight bulbs are simple to install and replace, allowing quick removal and replacement of old or damaged bulbs. Size: Krypton replacement bulb measures approximately 0.3 cm (0.12 inches) in length; compact design for easy storage. Keep out of reach of children to avoid potential choking hazard. What you get: 3 pieces of 4.8-volt 0.75A bayonet base krypton replacement flashlight bulbs; sufficient quantity for everyday use. Please verify size and part number before purchase. 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 bulb securely. 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 swallowing risk.