This is a Philco 6L6G vacuum tube with dark glass. It has been tested and is extra strong. The tube has a unit type and a unit quantity of one. It was manufactured in the United States and is suitable for use in vintage electronics and audio/visual equipment. The tube is non-domestic and is not part of a custom bundle. The model number is 6L6G. This tube is perfect for those who are looking to maintain or repair vintage equipment.Satisfaction guaranteed returns accepted Lot B2