Round Metal Pipe Reducer & Increaser | 14" to 12" HVAC Duct Reducer or Increaser 26g Gauge | Galvanized Sheet Metal Ducting Connector is Compatible with Duct 12" Color_Red Oak What does this mean 4 X 12 Is CRFG2028 Width_14in

What does this mean

5 IN A PACK - 4 Inch Diameter Pipe – 25 Foot Length When Connected – 30 Gauge Thick & Made of Thick & Durable Galvanized Sheet Metal - Used For HVAC System Duct Work In Any Building or Home

actual front end outer dimensions are 11

+ Product Details Size - 18"w X 30"h X 2"d (for duct opening measurement only)

ensuring optimal airflow while maintaining a sleek

Round Metal Pipe Reducer & Increaser 14" to 12" HVAC Duct Reducer or Increaser 26g Gauge Galvanized Sheet Metal Ducting Connector is Compatible with Duct 12" Color_Red Oak What does this mean 4 X 12 Is CRFG2028 Width_14in What does this mean 5 IN A PACK 4 Inch Diameter Pipe – 25 Foot Length When Connected – 30 Gauge Thick & Made of Thick & Durable Galvanized Sheet Metal Used For HVAC System Duct Work In Any Building or Home