Don't settle for ineffective or inadequate packaging tape when you could be using this high-quality product. Designed with a polypropylene backing reinforced with bi-directional continuous glass yarn across length and width--offering you a 150 lbs. per inch tensile strength longitudinal and 50 lbs. per inch width in cross direction. But it's not only strong it's also resistant to nicks abrasion moisture and scuffing. Plus it resists center seam splitting in both longitudinal and cross directions offering an efficient tape performance. Tape utilizes a specially formulated rubber resin adhesive that bonds immediately and effectively and offers shear strength to metal plastic and fiberboard. Tape Type: Packaging; Adhesive Material: Acrylic; Thickness: 5.75 mil; Size: 1.88in x 21 yds.