These are the label that we use for OUR shipping business – we have tried a lot of different labels and these are the BEST! 4″ X 6″ Direct Thermal Premium (Top-Coated) Paper Fanfold Labels w/Perf-2000 Labels Per Stack, 4000 Labels Per Case, Permanent (Acrylic) Adhesive, White Applications:premium direct thermal top-coated paper provides high-quality printing using heat to print on the material so no thermal ribbons are required. This material features a bright-white top coated that is resistant to moisture, oil, and heat. It is a perfect solution for many applications including: shipping, barcoding, inventory tracking, and much more. Our top-coated paper labels have a one-year shelf life when stored at +72 F and 50% relative humidity. Printers: Direct thermal printing provides high-quality printing using heat to activate the image onto the material, therefore thermal ribbons are not required. Our direct thermal labels are compatible for printing with most major brands of thermal printers. These 3-inch diameter core direct thermal labels are recommended for use only in a industrial-sized thermal printer from such manufactures as Citizen, Honeywell-Datamax, Intermec, Markem, Printronix, Toshiba TEC, TSC, Zebra and more..