3M 38506 Packaging Tape Refill Tape refill is designed for use with 3M Scotch DP300-RD Hand Dispenser, 3850-2ST Value Pack, and HB903 Pistol Grip. Strong, "clear-to-the-core" packaging tape protects your heaviest packages during mailing, moving, and shipping. Adhesive is aggressive, hot-melt rubber resin. Instant adhesion provides immediate holding power, quickly securing package contents. Tape resists breakage for hassle-free application and performance during the most demanding applications. Packaging tape meets U.S. Postal regulations.