Contractor Housing, 4 in Duct Size, BFQ110MBG;BFQ140MBG Fan;BFQ50T;BFQ75T;BFQ90MBG;Grill and Motor For Use With, Lock In Bracket Includes, Polymeric Material, 4 in Opening Diameter, 8-1/2 in Overall Depth, 3-7/8 in Overall Height, 9-1/8 in Overall Width, 4 PK Package Quantity