Round Metal Pipe Reducer & Increaser | 12" to 4" HVAC Duct Reducer or Increaser 30g Gauge | Galvanized Sheet Metal Ducting Connector is Compatible with Duct 4" w26h26 + Product Details Perfect Fit CRFG2028 Width_14in 4 X 12 Is

+ Product Details Perfect Fit & Easy Sizing - Designed for a 20" x 24" OR 24" x 20" duct opening (measured at the opening)

+ Product Details Size – The size of 5" straight saddle stick on take-off is 7"/10" and it is compatible with duct 5"

rust-resistant aluminum

+ Product Details Size - 32"w X 32"h is the size for the duct opening measurement only

+ Product Details Size - 28"w X 28"h is the size for the duct opening measurement only

Round Metal Pipe Reducer & Increaser 12" to 4" HVAC Duct Reducer or Increaser 30g Gauge Galvanized Sheet Metal Ducting Connector is Compatible with Duct 4" w26h26 + Product Details Perfect Fit CRFG2028 Width_14in 4 X 12 Is + Product Details Perfect Fit & Easy Sizing Designed for a 20" x 24" OR 24" x 20" duct opening (measured at the opening) + Product Details Size – The size of 5" straight saddle stick on take off is 7" 10" and it is compatible with duct 5"