Avery 4186 direct thermal labels are designed to be compatible with a variety of thermal printers including the Seiko Smart Label Printer, DYMO LabelWriter and Zebra printers. The durable roll is packed in a special bag designed to protect each roll from light and moisture. These multipurpose smudge-free labels are resistant to water, dirt, dust and grease. The adhesive helps labels stick and stay in place, making them perfect for a variety of applications. Great for a variety of purposes such as mailing, postage, barcodes and UPC codes for shipment tracking, products, document & file folder identification and more.