Broan 21-Inch Custom Range Hood Power Pack. 450 Max Blower Cfm. Stainless Steel The Pm400Ss Powerpack Insert Is Ideal For Custom Range Hood Applications. Achieve A Custom Look And Protect Cabinetry With Optional Stainless Steel Liners. This Three-Speed Powerpack Insert Delivers Up To 450 Max Blower Cfm. Featuring A Smooth. Stainless Steel Surface That Is Easy To Clean With Quick-Release Dishwasher-Safe Filters. The Bright Led Lighting Enhances Your Cooking Experience.