Axial Fan Filter, Radiator Connection 8 3/8 in, For Use With 3240.xxx, 3241.xxx, Media Material Not Applicable, Fits Fan Shape Square, 8 3/8 in Height, 8 3/8 in Width, 13/16 in Depth, Frame Material Polybutylene Terephthalate, Standards UR and CUR Recognized, Package Quantity 5