Nautilus, Premium 110 CFM Bathroom Fan, 11-1/8"x 10-5/8" White Polymeric Grille, Mounting Brackets Adjustable Up To 24", Ceiling Mount Only, Lifetime Lubricated Plug In Motor, Installs In 4" Round Duct, UL Listed For Use Over Tub/Shower Enclosures With GFCI Protected Branch Circuit, Housing Size: 5-3/4"H x 8-1/4"W x 8"D, For Bathrooms Up To 105 SQFT.