32"W X 4"H [Duct Opening] Linear Aluminum Clip-On Bar Return Air Grille [Outer Dimensions: 33.25"W x 5.25"H] w18h18 + Product Details Perfect Fit

+ Product Details Perfect Fit & Easy Sizing - Designed for a 24" x 24" duct opening (measured at the opening)

Actual Filter Size – 13 3/4"w x 24 3/4" x 1"

+ Product Details Size – Size - Cuts 45mm & below

+ Product Details Size – 28"w X 20"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 16 5/8" width X 8 5/8" height

32"W X 4"H [Duct Opening] Linear Aluminum Clip-On Bar Return Air Grille [Outer Dimensions: 33.25"W x 5.25"H] w18h18 + Product Details Perfect Fit+ Product Details Size 32"W X 4"H is (for duct opening measurement only); actual front end outer dimensions are 33. 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