Mailroom professionals need the super strong, reliable seal of Scotch Commercial Grade Shipping Packaging Tape. Heavy duty, hot melt, solvent free adhesive combined with polypropylene backing keeps out moisture, dust & dirt & assures reliable closures. Designed for industrial use, one strip at a time instead of many layers seals your package securely. Resistance to splitting & slivering saves time, while a release coating makes unwind easy. Tough jobs demand the right tools. For packaging boxes, Scotch Commercial Grade Shipping Packaging Tape is the best tool for jobs that demand heavy duty performance. Refill Rolls. Grade: Heavy-Duty; Core Size: 3"; Dispenser Included: No; Adhesive Material: Hot Melt Synthetic Rubber.