20"W X 4"H [Duct Opening] Linear Aluminum Clip-On Bar Return Air Grille [Outer Dimensions: 21.25"W x 5.25"H] Compatible with Duct 7" Applications – The Galvanized Steel d Product Details Size The 170B 16X16 FBA

Applications – The Galvanized Steel Round Take-Off Duct is used for transition from an air plenum or square duct to a round pipe

+ Product Details Size - 18"w X 32"h X 2"d (for duct opening measurement only)

provide versatility while ensuring safety with a slight rearward tilt

Applications – These saddle airtight take-offs are used to transition from a round surface to a round pipe or insulated flexible duct

+ Product Details Size - 8"w X 14"h is the size for the duct opening measurement only

20"W X 4"H [Duct Opening] Linear Aluminum Clip On Bar Return Air Grille [Outer Dimensions: 21.25"W x 5.25"H] Compatible with Duct 7" Applications – The Galvanized Steel d Product Details Size The 170B 16X16 FBA Applications – The Galvanized Steel Round Take Off Duct is used for transition from an air plenum or square duct to a round pipe + Product Details Size 18"w X 32"h X 2"d (for duct opening measurement only)