40"W X 6"H [Duct Opening] Linear Aluminum Clip-On Bar Return Air Grille [Outer Dimensions: 41.25"W x 7.25"H] Ducting Components making it an ideal choice

making it an ideal choice for both residential and commercial settings

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

Achieve superior control over your indoor airflow for a more comfortable space

Designed for effortless fitting and a secure connection

pair it with our butterfly dampers

40"W X 6"H [Duct Opening] Linear Aluminum Clip-On Bar Return Air Grille [Outer Dimensions: 41.25"W x 7.25"H] Ducting Components making it an ideal choice+ Product Details Size 40"W X 6"H is (for duct opening measurement only); actual front end outer dimensions are 41. 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