40"W X 8"H [Duct Opening] Linear Aluminum Clip-On Bar Return Air Grille [Outer Dimensions: 41.25"W x 9.25"H] 12" Round Duct Pipe + Product Details Size -

+ Product Details Size - 16"w X 32"h X 2"d (for duct opening measurement only)

+ Product Details Size – 18"w X 12"h is the size for the duct opening measurement only

+ Product Details Size – 14" x 22" or 22" x 14" is the size for the duct opening measurement only

Locking Security System – Features a built-in eight-tumbler lock and a supplied key to prevent tampering and maintain consistent temperature settings

40"W X 8"H [Duct Opening] Linear Aluminum Clip-On Bar Return Air Grille [Outer Dimensions: 41.25"W x 9.25"H] 12" Round Duct Pipe + Product Details Size -+ Product Details Size 40"W X 8"H is (for duct opening measurement only); actual front end outer dimensions are 41. 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