Description
Round Metal Pipe Reducer & Increaser 20" to 18" HVAC Duct Reducer or Increaser 26g Gauge Galvanized Sheet Metal Ducting Connector is Compatible with Duct 18" Compatible With Duct 4in Actual Filter Size – 33 Grille We carry sizes the 1448FLRSTRT Actual Filter Size – 33 3 4"w x 29 3 4" x 1" + Product Details Size 26"w X 16"h X 2"d (for duct opening measurement only)