The Inca Smart Insert Is Perfect When You Want The Hood To Hide. This Compact Insert Fits Easily Into Upper Cabinets As Small As The Standard 12″ Depth And Features An Exceptionally Well Finished Bottom In Painted Gray. – 250 Cfm – Fits Cabinets As Small As 12″ Deep – Fits Custom Hoods 24″ Wide And Up – Convertible To Recirculating – Built In Mounting System