This is a TOSHIBA TEC label, part number LTS025015R1ST-AZ, designed for thermal transfer printing. The labels are white, top-coated for durability and print quality, and measure 2.5 inches by 1.5 inches. Each roll contains 3,600 labels, and there are 8 rolls per case, with a 3-inch core diameter and an 8-inch outer diameter, and the labels are wound out.