20"W X 8"H [Duct Opening] Linear Aluminum Clip-On Bar Return Air Grille [Outer Dimensions: 21.25"W x 9.25"H] 6" Round Duct Pipe + Product Details Size &

+ Product Details Size & Compatibility – The 12" round quadrant volume damper is compatible with duct 12"

12"w X 3"h Is The Size For The Duct Opening Measurement Only

color: #fff

or other air-handling equipment

Dimensions With Outer End are 7

20"W X 8"H [Duct Opening] Linear Aluminum Clip-On Bar Return Air Grille [Outer Dimensions: 21.25"W x 9.25"H] 6" Round Duct Pipe + Product Details Size &+ Product Details Size 20"W X 8"H is (for duct opening measurement only); actual front end outer dimensions are 21. 25" Width X 9. 25" Height. Design Designed for concealed, flush placement on your wall with a 3 8 inch space between louvers, this linear grille comes with an installation frame and clips for easy hook in assembly, ensuring a refined and seamless look. High Quality Aluminum The premium durable aluminum will never rust and it will never