Universal Heavy-Duty Box Sealing Tape 3 Core 1.88 x 54.6 yds Clear - Use this box sealing tape if you want a reliable strong and durable tape. The 100% polypropylene film is flexible waterproof split- burst- and stretch-resistant--meaning you can use it in a variety of environments. The extra holding power is designed for use on cartons up to 50 lbs. Plus with a tensile (bursting) strength of 35 lbs. theres plenty of reason to have faith in this clear tape. Utilizes a hot melt adhesive for a superior grip. UPS and Parcel Post Approved.