40"W X 6"H [Duct Opening] Linear Aluminum Clip-On Bar Return Air Grille [Outer Dimensions: 41.25"W x 7.25"H] Compatible With Duct 4in very easy to do

very easy to do

+ Product Details Size - 28"W X 8"H is (for duct opening measurement only)

Design – Designed for concealed

+ Product Details Size – 14" x 24" or 24" x 14" is the size for the duct opening measurement only

+ Product Details Size – 7" round duct sheet metal elbow - 30 gauge galvanized - crimped end connection - adjustable from 5° - 90°

40"W X 6"H [Duct Opening] Linear Aluminum Clip-On Bar Return Air Grille [Outer Dimensions: 41.25"W x 7.25"H] Compatible With Duct 4in very easy to do+ 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