12"W X 6"H [Duct Opening] Linear Aluminum Clip-On Bar Return Air Grille [Outer Dimensions: 12.25"W x 7.25"H] Compatible With Duct 12in + Product Details Size –

+ Product Details Size – 18"w X 32"h is the size for the duct opening measurement only

or HVAC system (actual size: 9

+ Product Details Size – 6" x 26" or 26" x 6" is the size for the duct opening measurement only

this grille enhances air circulation

+ Product Details Size - 32"w X 4"h is the size for the duct opening measurement only

12"W X 6"H [Duct Opening] Linear Aluminum Clip-On Bar Return Air Grille [Outer Dimensions: 12.25"W x 7.25"H] Compatible With Duct 12in + Product Details Size –+ Product Details Size 12"W X 6"H is (for duct opening measurement only); actual front end outer dimensions are 13. 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