Now even the heaviest packages can withstand rough handling. Our Scotch® Heavy Duty Shipping Packaging Tape holds strong on all box types, including 100% recycled boxes. It's even guaranteed to stay sealed. The strong, tough, solvent-free hot melt adhesive locks in your heavy duty contents and locks out everything else. Meets US Postal Regulations for standard packages. Value PackFour rolls with refillable dispensers (one dispenser per roll). Grade: Heavy-Duty; Core Size: 3"; Dispenser Included: Yes; Adhesive Material: Hot Melt Synthetic Rubber.