Fan Grilles and Filters: Type - Fan Filter Kit; Size - Fan - nominal - 92mm (3.62 in); Size - Mounting Hole Centers - 82.6mm (3.25") O.C.; Size - Dimensions - 92 x 92mm (3.62 x 3.62"); Contents - Guard, Retainer, Filter; Material - Filter - Foam 30 ppi; Additional Information - Fits Fan Size 3.62" Square (92 mm)