Broan; J-can Housing; Grille Size: 9-1/2 In Width X 11-5/8 In Length X 3/8 In Thickness; Housing Size: 10 In Length X 8 In Width X 8-3/4 In Height; Duct Size: 4in Round; Material: Steel Housing, Steel Grille, Steel Frame, Stainless Steel Closure Spring;