Round Metal Pipe Reducer & Increaser | 4" to 3" or 3" to 4 HVAC Duct Reducer or Increaser 30g Gauge | Galvanized Sheet Metal Brazing Solder Rods this robust access door ensures

this robust access door ensures security with its tumbler lock mechanism

With four elegant colors and various sizes available

The total outer size of this grille is the listed size plus plus 2 and 5/8"

+ Product Details Size - 30"w X 8"h Is The Size For The Duct Opening Measurement Only

Designed with a built-in ratcheting mechanism

Round Metal Pipe Reducer & Increaser | 4" to 3" or 3" to 4 HVAC Duct Reducer or Increaser 30g Gauge | Galvanized Sheet Metal Brazing Solder Rods this robust access door ensures+ Product Details Size & Compatibilty The 4" to 3" round metal pipe reducer & increaser 30 gauge is compatible with duct 4" to 3". Made in the USA Premium Quality Our galvanized ducting connector is made of high quality galvanized sheet metal. Applications Reducers transition ducts from larger to smaller sizes and ensure smooth, continuous airflow. + Product Description The HVAC Premium Round Metal Pipe Reducer & Increaser is crafted from high quality