36"W X 6"H [Duct Opening] Linear Aluminum Clip-On Bar Return Air Grille [Outer Dimensions: 37.25"W x 7.25"H] Welding & Soldering + Product Details Size –

+ Product Details Size – 8"w X 10"h is the size for the duct opening measurement only

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+ Product Details Size & Compatibilty - The 10" to 9" round metal pipe reducer & increaser 30 gauge is compatible with duct 10" to 9"

36"W X 6"H [Duct Opening] Linear Aluminum Clip-On Bar Return Air Grille [Outer Dimensions: 37.25"W x 7.25"H] Welding & Soldering + Product Details Size –+ Product Details Size 36"W X 6"H is (for duct opening measurement only); actual front end outer dimensions are 37. 25" Width X 7. 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