Best Seller | RITTAL 3237200 Exhaust Filter, 4.57"x4.57" Compact Axial Fan Grille, Radiator Connection 4 19/32 in, For Use With 3237 Series, 15 cfm Fan, Fits Fan Shape Square, 4 5/8 in Height, 4 5/8 in Width, 11/16 in Depth, Frame Material ABS Plastic, Includes Foam Filter Mat, Standards UL, Fan Guard... ... more RITTAL 3237200 Exhaust Filter, 4.57"x4.57" Compact Axial Fan Grille, Radiator Connection 4 19/32 in, For Use With 3237 Series, 15 cfm Fan, Fits Fan Shape Square, 4 5/8 in Height, 4 5/8 in Width, 11/16 in Depth, Frame Material ABS Plastic, Includes Foam Filter Mat, Standards UL, Fan Guard... | | $57.59 go to store |