"These labels are great for pricing, organization, indentification, small microscope specimen samples, and more NOTE: Does not include the black plastic cartridge. Cartridges are not universal for every roll. Please look in the ""Related Products"" if you would like to purchase one of HouseLabels' re-usable cartridges. A different cartridge is required for each roll model. •1/2"" Diameter (12mm) •1200 labels per roll •Labels are bright white for professional results •Labels are smudge-proof as well as water and oil resistant •BPA Free •All labels sold by HouseLabels for use in Brother P-touch Label Printers are tested to ensure that these labels all fall within Brother material specifications BROTHER P-touch Label Printers: QL-500, QL-550, QL-570, QL-570VM, QL-580N, QL-650TD, QL-700, QL-710W, QL-720NW, QL-1050, QL-1050N, QL-1060N "