AdTech’s Permanent 3/8" Dot Glue Runner Refill is a replacement cassette for the complete unit, and is both acid-free and safe to use on photos. The permanent adhesive bonds instantly to paper, ribbon, foam, plastic, wood and many other materials, making it ideal for scrapbooking, photo albums and a host of crafting projects. The standout feature of this glue runner, however, is that you can apply a long line of adhesive dots, or a single dot with ultimate precision.Details:3/8" adhesive dots8.75 yd. of adhesive dotsPermanentAcid-freeNontoxicPhoto-safe