C..17-3/4 in, Frame Material ABS Plastic, PPI Rating 30, Includes Filter, Standards cULus, Fan Guard Mounting Side Exhaust Compact Axial Fan Grille, Radiator Connection 5 23/32 in, For Use With FF66 Series, Fits Fan Shape Square, 5 29/32 in Height, 5 29/32 in Width, 1/3 in Depth, Mounting Eye O.