Permanent adhesive is guaranteed to stick and stay put on cardboard envelopes paper glass or metal. No more jams or smudges with Avery shipping labels. White labels optimized for laser & inkjet printers. TrueBlock technology covers up everything underneath the shipping label so you can reuse boxes. Easily customize these printable labels with thousands of templates and designs on the Avery site. Great for shipping and mailing organizing boxes bin labels classroom organization & stickers filing & organizing and bottle labels.