This is a set of 12 packs of Sylvania Flashbulbs with Blue Dot M3 Clear Bulbs. The bulbs are made in the United States and are perfect for vintage photography enthusiasts. The brand, Sylvania, is well-known for producing high-quality bulbs that last for a long time. These bulbs are designed for use with cameras and provide a classic look that is not possible with modern digital cameras. The bulbs are easy to use and produce a bright, blue-white flash that is perfect for portraits and still-life photography. The set includes everything you need to get started, including a flashbulb holder and a pack of 12 bulbs. Whether you are a seasoned photographer or just starting out, these Sylvania Flashbulbs are sure to impress.