Light Duty Reinforced Water Activated Tape. Laminated with non,asphaltic adhesive. Top Sheet 23 lbs/ream Natural Virgin Kraft / Bottom 23 lbs. 3,way Reinforcing Pattern: Lengthwise is 110 Denier Fiberglass , 5/8 spacing (1,1,1,1,1); Cross Machine is 150 Denier Fiberglass / Diamond Pattern <1.25. Recommended for sealing light weight cartons weighing up to 25 lbs.