Square Mounting Bracket, Fire Rating 3 hr, For Pipe Size Not Applicable, For Use On Wall Penetrations, Floor Penetrations, Includes Not Applicable, Includes Mounting Hardware Not Applicable, Outside Diameter Not Applicable, Overall Height 0.75 in, Overall Length 4 in, Overall Width 4 in, Product Type Mounting Bracket, Shape Not Applicable, Usage Location Commercial Construction Surfaces, Color Silver, For Use With 3M Fire Barrier Pass-Through Device, 1 Pair