3M Shipping Labels with Cover-Up technology For Laser Printers, 5-1/2 x 8-1/2 Inches, 2 Labels/Sheet, 100-Pack (3100-Z) White, 5 1/2 x 8 1/2 in Cover-Up technology completely covers up everything underneath White labels ensure you can use them even on the messiest of boxes Designed for use with laser printers 100% satisfaction guaranteed including jam free and smudge