Round Metal Pipe Reducer & Increaser | 7" to 6" or 6" to 7" HVAC Duct Reducer or Increaser 30g Gauge | Galvanized Sheet Metal Ducting Connector is Compatible with Duct 6" Extruded Aluminum Ceiling actual front end outer dimensions 4 X 12 Is CRFG2028 Width_14in

actual front end outer dimensions are approximately 18 5/8" width X 22 5/8" height

Actual Filter Size – 17 3/4"w x 23 3/4" x 1"

+ Product Details Size - 20"w X 8"h is the size for the duct opening measurement only

ensuring accurate thermostat operation

Solid Base for Stability – Built with a solid base for reliable mounting and stability

Round Metal Pipe Reducer & Increaser 7" to 6" or 6" to 7" HVAC Duct Reducer or Increaser 30g Gauge Galvanized Sheet Metal Ducting Connector is Compatible with Duct 6" Extruded Aluminum Ceiling actual front end outer dimensions 4 X 12 Is CRFG2028 Width_14in actual front end outer dimensions are approximately 18 5 8" width X 22 5 8" height Actual Filter Size – 17 3 4"w x 23 3 4" x 1"