12"W X 8"H [Duct Opening] Linear Aluminum Clip-On Bar Return Air Grille [Outer Dimensions: 13.25"W x 9.25"H] Compatible with Duct 7" round-connects to vent register diffuser

round-connects to vent register diffuser

+ Product Details Perfect Fit & Easy Sizing - Designed for a 10" x 24" or 24" x 10" duct opening (measured at the opening)

actual front end outer dimensions are approximately 3

+ Product Details Size – 36"w X 6"h is the size for the duct opening measurement only

you can watch this informative video tutorial: How to Measure Your Vent Hole Before Ordering a Grille

12"W X 8"H [Duct Opening] Linear Aluminum Clip-On Bar Return Air Grille [Outer Dimensions: 13.25"W x 9.25"H] Compatible with Duct 7" round-connects to vent register diffuser+ Product Details Size 12"W X 8"H is (for duct opening measurement only); actual front end outer dimensions are 13. 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