Heavy duty tape is Scotch® Brand's strongest, clear-to-core packing tape. Scotch® Heavy Duty Packing Tape 3850, gives even the heaviest packages the support they need to withstand rough handling. Scotch® Heavy Duty Tape seals seams with one strip and keeps boxes closed. Our packing tape resists slivering, splitting and tearing. 40X stronger than acrylic tapes (in shear adhesion holding power, compared to acrylic tapes based on ASTMB) Heavy duty adhesive shipping packaging tape 1.88" x 54.6 yds Clear tape Strong, durable solvent-free hot melt adhesive with 3.1 mil thickness 30 lbs. per inch tensile strength 3" Core to be used with any standard dispenser Meets U.S. Postal regulations for standard packages 18 Rolls/Pack Made in the U.S.A. with globally sourced materials Formulated to handle wide temperature ranges, from 40 degrees to 120 degrees Guaranteed to Stay Sealed (If your box does not stay sealed, 3M will refund the purchase price of this tape. Proof of purchase required. Contact: 1-800-3MHELPS)