48"W X 4"H [Duct Opening] Linear Aluminum Clip-On Bar Return Air Grille [Outer Dimensions: 49.25"W x 5.25"H] white These are specially sized to

These are specially sized to fit into all drop cielings

the actual front end outer dimensions are 10" in diameter

Actual Filter Size – 33 3/4"w x 5 3/4" x 1"

condensing boilers

48"W X 4"H [Duct Opening] Linear Aluminum Clip-On Bar Return Air Grille [Outer Dimensions: 49.25"W x 5.25"H] white These are specially sized to+ Product Details Size 48"W X 4"H is (for duct opening measurement only); actual front end outer dimensions are 49. 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