Feature Highlights:1. Versatile Compatibility & Reliable Performance: This krypton flashlight bulb delivers 4.8 volts at 0.75 amps, providing bright light for your everyday needs. It's designed as a perfect replacement for 3D or 4D flashlights.2. Durable Construction: Made from quality glass and metal, these bulbs are built to last, ensuring a long service life and consistent performance.3. Effortless Installation: Featuring a standard bayonet base, these replacement bulbs are incredibly easy to install and remove. You can quickly swap out old or broken bulbs in your flashlight in just moments.4. Compact & Space-Saving: Each bulb is small, measuring approximately 0.3 cm (0.12 inches) in length. They're easy to store without taking up much space. (Please store safely away from young children to prevent any risk of swallowing.)5. Great Value Pack: You receive 3 replacement bulbs in one pack, offering ample quantity for immediate use and future spares, ensuring your flashlight is always ready when you need it.Product Details:Upgrade your flashlight with these reliable krypton replacement bulbs. They produce a bright beam (4.8V, 0.75A) ideal for general use. Crafted from durable glass and metal, they fit flashlights requiring 3D or 4D type bulbs with a bayonet base. Installation is a simple, tool-free process—just align and twist. The compact size makes them easy to store. This practical 3-pack ensures you have backups on hand.Specifications: Material: Glass, Metal Part Number: 41-1660 Bulb Type: Krypton, Bayonet Base Output: 4.8 Volts, 0.75 Amps Compatibility: For 3D / 4D Flashlights Approx. Length: 0.3 cm / 0.12 inches Package Includes: 3 x Replacement BulbsEasy Installation Guide:1. First, verify the size and part number match your flashlight's requirements.2. Open your flashlight and carefully remove the old bulb.3. Align and insert the new bayonet base bulb into the socket.4. Gently press and twist clockwise to lock it securely in place.5. Reassemble your flashlight—you're all set!Important Notes: Please double-check compatibility (size/part number) before purchase. Slight size variations may occur due to manual measurement. Always keep these bulbs away from small children to prevent any choking hazard.