Universal One Heavy-Duty Box Sealing Tape, 48mm x 50m, 3 inch Core, Clear, 36/PackFlexible, waterproof, split-, burst- and stretch-resistant polypropylene film backing provides peace of mind. Superior-gripping hot melt adhesive ensures a strong bond. Tape is UPS and Parcel Post Approved for cartons up to 50 lbs. Stock up and save! Tape Type: Packaging; Adhesive Material: Hot Melt Adhesive with Corru-Grip Technology; Width: 48 mm; Thickness: 3 mil.