30" x 6" Cube Core Eggcrate Return Air Filter Grille for 1" Filter sidewall 6"w X 6"h 3-Way Fixed

6"w X 6"h 3-Way Fixed Curved Blade Air Supply Diffuser - Vent Duct Cover - Grille Register - Sidewall or Cieling - High Airflow - White

and centralized air ducted units

Looks Like It Was Just Waxed

+ Product Details Size - 12"w X 14"h is the size for the duct opening measurement only

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30" x 6" Cube Core Eggcrate Return Air Filter Grille for 1" Filter sidewall 6"w X 6"h 3-Way Fixed+ Product Details Perfect Fit & Easy Sizing Designed for a 30" x 6" OR 6" x 30" duct opening (measured at the opening), with actual outer dimensions of 32. 5" W x 8. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 29. 75" x 5. 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