20"W X 4"H [Duct Opening] Linear Aluminum Clip-On Bar Return Air Grille [Outer Dimensions: 21.25"W x 5.25"H] Compatible with Duct 10" + Product Details Size -

+ Product Details Size - 14"w X 32"h is the size for the duct opening measurement only

designed for superior airflow (up to 95%) and easy filter access

Screws Included - Easy Unrestricted Air Flow For Your HVAC System

+ Product Details Size – 20" x 28" or 28" x 20" is the size for the duct opening measurement only

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20"W X 4"H [Duct Opening] Linear Aluminum Clip-On Bar Return Air Grille [Outer Dimensions: 21.25"W x 5.25"H] Compatible with Duct 10" + Product Details Size -+ Product Details Size 20"W X 4"H is (for duct opening measurement only); actual front end outer dimensions are 21. 25" Width X 5. 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