Compact Axial Fan Grille, Radiator Connection 5 51/64 in, For Use With 3238 Series, 39 cfm Fan, Fits Fan Shape Square, 5 51/64 in Height, 5 51/64 in Width, 2/3 in Depth, Frame Material ABS Plastic, Includes Foam Filter Mat, Standards UL, Fan Guard Mounting Side Exhaust.