This 2.5" round direct thermal blue adhesive label from Labels and More is compatible with various printers such as Zebra, Munbyn, Rollo, Datamax, Sato, Eltron, and more. The label has a permanent adhesive that allows for easy application by just peeling and sticking. The label's outer diameter is 4 inches, and it has a core size of 1 inch ID. The label is made of high-quality direct thermal paper material, and it comes with a total of 10,000 labels. The label type is Zebra Labels, and it is perfect for use in shipping labels and tags, address labels, and more. This product is made in the United States, and it is a great investment for any business or industrial setting.