Firestop Pillow, Fire Rating 3 hr, Fire Resistance Type Intumescent, Firestop Type Pillow, Interlocking No, Overall Height 12.5 in, Overall Length 9.25 in, Overall Width 11.25 in, Color Red, Features No Tools Required, Forms A Very Hard Char When Burned, No Wire Mesh Required in Certain Installations, For Maximum Opening 288 sq in, For Use On Cable Trays, Cables, Pipe, Standards ASTM E119, FM Approved, UL 263