12"W X 8"H [Duct Opening] Linear Aluminum Clip-On Bar Return Air Grille [Outer Dimensions: 13.25"W x 9.25"H] Mounting Bracket It is compatible with duct

It is compatible with duct 7"

If you are looking for a good quality Duct Round Cap to enhance your project look no further than HVAC Premium

+ Product Details Size & Compatibility – The size of galvanized sheet metal straight floor boot is 10" X 4" X 4"

+ Product Details Perfect Fit & Easy Sizing - Designed for a 6" x 34" or 34" x 6" duct opening (measured at the opening)

actual front end outer dimensions are approximately 28 5/8" width X 12 5/8" height

12"W X 8"H [Duct Opening] Linear Aluminum Clip-On Bar Return Air Grille [Outer Dimensions: 13.25"W x 9.25"H] Mounting Bracket It is compatible with duct+ 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