28"W X 8"H [Duct Opening] Linear Aluminum Clip-On Bar Return Air Grille [Outer Dimensions: 29.25"W x 9.25"H] w26h26 9% pure copper meeting ASTM

9% pure copper meeting ASTM B280 and C12200 standards

Produced in accordance with ISO 9001-2008 Quality Management System

5" width x 15

+ Product Details Perfect Fit & Easy Sizing - Designed for a 18" x 14" OR 14" X 18" duct opening (measured at the opening)

28"W X 8"H [Duct Opening] Linear Aluminum Clip-On Bar Return Air Grille [Outer Dimensions: 29.25"W x 9.25"H] w26h26 9% pure copper meeting ASTM+ Product Details Size 28"W X 8"H is (for duct opening measurement only); actual front end outer dimensions are 29. 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