Compact Axial Fan Grille Radiator Connection 12 51/64 in For Use With 3243/3244 Series 353/424 cfm Fan Fits Fan Shape Square 12 51/64 in Height 12 51/64 in Width 1 in Depth Frame Material ABS Plastic Includes Foam Filter Mat Standards CE cUL Recognized Type 12 Rated UL Fan Guard Mounting Side Exhaust