16"W X 4"H [Duct Opening] Linear Aluminum Clip-On Bar Return Air Grille [Outer Dimensions: 17.25"W x 5.25"H] Height_22in The aluminum and gypsum construction

The aluminum and gypsum construction makes it impervious to moisture

Verify that the surface is stable and level to prevent vibrations and noise

including round exhaust air duct systems for dryers

much more than the required 700 psi for r410

16"W X 4"H [Duct Opening] Linear Aluminum Clip-On Bar Return Air Grille [Outer Dimensions: 17.25"W x 5.25"H] Height_22in The aluminum and gypsum construction+ Product Details Size 16"W X 4"H is (for duct opening measurement only); actual front end outer dimensions are 17. 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