BookGuard 1-1/2 Inch  Vinyl-Coated Cotton Cloth Book Binding Repair Tape, 15 Yard Roll, Black High abrasion resistance (keeps books bound longer than most other binding tapes) 13 mils thick, 45 pound tensile strength | 1.5 inches wide, 15 yards long on a 3 inch core Made of vinyl-coated cotton cloth (fabric) tape; black color is impregnated into cloth (not a topical coating) Archival safe: acid free/ PH neutral Ultra aggressive adhesive, highly conformable; tape arrives cleanly shrink wrapped