36"W X 4"H [Duct Opening] Linear Aluminum Clip-On Bar Return Air Grille [Outer Dimensions: 37.25"W x 5.25"H] Flexible Ducts + Product Details Size –

+ Product Details Size – Duct end cap is 20" X 8" | 26-gauge galvanized steel end cap

+ Product Details Size - 18"w X 6"h is the size for the duct opening measurement only

+ Product Details Size – The size of 4" straight saddle stick on take-off is 6"/7"/8" and it is compatible with duct 4"

Copper coil line set fits most ductless mini split air conditioners

36"W X 4"H [Duct Opening] Linear Aluminum Clip-On Bar Return Air Grille [Outer Dimensions: 37.25"W x 5.25"H] Flexible Ducts + Product Details Size –+ Product Details Size 36"W X 4"H is (for duct opening measurement only); actual front end outer dimensions are 37. 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