Broan 356NDK Non Duct Recirculation Kit for PM250 Series Kitchen Power Pack N/A Imported Includes charcoal filter, soffit grille, 90-Degree stack boot, and 7-Inch round duct For non-ducted recirculation when exterior ducting is not practical Broan filters are made from the highest quality materials Provides the longest life possible and keep your range hood operating at peak performance