AdTech's Permanent Tape 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, gift wrapping and a host of crafting projects.Details:8.75 yd. of adhesive each2 refillsAcid-freeNontoxicPhoto-safe