6" x 28" or 28" x 6" Cube Core Eggcrate Return Air Filter Grille for 1" Filter - Aluminum - White [Outer Dimensions: 8.5" X 30.5"] RG66 Black-HP #hvac-product-accordion

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Actual Filter Size – 11 3/4"w x 13 3/4" x 1"

+ Product Description Our Clear Plastic Thermostat Guard is the ultimate solution for protecting your thermostat while ensuring universal compatibility

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6" x 6" - opening (vent hole - Neck Size) dimension - actual size is approx 2" wider

6" x 28" or 28" x 6" Cube Core Eggcrate Return Air Filter Grille for 1" Filter - Aluminum - White [Outer Dimensions: 8.5" X 30.5"] RG66 Black-HP #hvac-product-accordion+ Product Details Perfect Fit & Easy Sizing Designed for a 6" x 30" or 30" x 6" duct opening (measured at the opening), with actual outer dimensions of 8. 5" W x 32. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 5. 75" x 29. 75" x 1" Premium Airflow Efficiency High performance cube core eggcrate design allows 95% airflow efficiency, reducing energy costs and maximizing HVAC system lifespan. Durable, Rust Free Aluminum Made