Munbyn Generic Shipping Series Labels (GR): 4-inch x 6-inch (101.6mm x 152.4mm). 500 shipping labels per stack. Packed in a kraft carton to prevent damage. Tips: It is only suitable for thermal printers, not laser or inkjet printers | No Bpa and Bps: Bpa (Bisphenol A) is an industrial chemical. It can cause endocrine disorders and have certain effects on people's health. Our paper has been tested to contain no carcinogens such as Bpa and Bps | Waterproof and Oil-proof: Resists scratches, water, dirt, dust, and grease, and Blank 4x6 mailing label with the perforated line for easy peeling | Reliable Upgrade Materials: The thermal labels are upgraded materials that print crystal-clear images and easy-to-read barcodes. They are brighter than the leading brand and have significant resistance to smudges and scratches | Strong Compatibility: The printer labels are perfectly compatible with Munbyn, Jadens, Rollo, Idprt, Beeprt, Asprink, Nelko, Phomemo, Polono, Labelrange, Offnova, Joise, Beeprt, Prt, Jiose, Itari, K Comer, Neflaca and other direct thermal printers without the hassle of sheet waste, or jams | Ultra-Strong Adhesive: Peel-and-stick extra-large labels with strong self-adhesive backing. They use a premium-grade and powerful adhesive that allows each label to stick tightly to any packaging surface for a long time | Multi-platform Compatible: Print shipping labels and internet postage labels for transportation platforms and e-commerce platforms. Compatible with Fedex, Usps, Ups, Shopify, Etsy, Amazon, eBay, Paypal, Poshmark, Depop, Mercari, etc