Type: Thermal (Ribbon Not Required) Adhesive: Permanent Labels per Roll: 500 Core size: 50mm Also works with some models & variations of the following manufacturers printers listed below: Zebra Printers Toshiba Printers Citizen Printers Eltron Printers Orion Printers SATO Printers UPS Printers and more. Plain white Direct Thermal printer labels. (500 labels per roll) Supplied using the best grade thermal material available on the market. These labels are a Direct Thermal type which means you Don’t need to use a ribbon to print. These labels are supplied with a high quality permanent adhesive.