4" White Colored Premium-Cloth Book Binding Repair Tape | 15 Yard Roll (BookGuard Brand) High abrasion resistance (keeps books bound longer than most other binding tapes) 13 mils thick, 45 pound tensile strength | 4 inches wide, 15 yards long on a 3 inch core Made of vinyl-coated cotton cloth (fabric) tape; white 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