20"W X 8"H [Duct Opening] Linear Aluminum Clip-On Bar Return Air Grille [Outer Dimensions: 21.25"W x 9.25"H] Height_22in + Product Details Perfect Fit

+ Product Details Perfect Fit & Easy Sizing - Designed for a 34" x 26" Or 26" x 34" duct opening (measured at the opening)

Actual Filter Size – 9 3/4"w x 33 3/4" x 1"

ensuring a perfect fit

+ Product Details Perfect Fit & Easy Sizing - Designed for a 26" x 18" OR 18" x 26" duct opening (measured at the opening)

With a 4" diameter for the duct opening measurement

20"W X 8"H [Duct Opening] Linear Aluminum Clip-On Bar Return Air Grille [Outer Dimensions: 21.25"W x 9.25"H] Height_22in + Product Details Perfect Fit+ Product Details Size 20"W X 8"H is (for duct opening measurement only); actual front end outer dimensions are 21. 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