14" x 32" or 32" x 14" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Color_Anodized Aluminum Ideal for Walls & Ceilings:

Ideal for Walls & Ceilings: Designed for seamless installation in standard 16" X 6" duct openings

Actual Filter Size – 17 3/4"w x 21 3/4" x 1"

+ Product Details Size – 12" x 36" or 36" x 12" is the size for the duct opening measurement only

Marked circles for cutout

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

14" x 32" or 32" x 14" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Color_Anodized Aluminum Ideal for Walls & Ceilings:+ Product Details Perfect Fit & Easy Sizing Designed for a 14" x 32" OR 32" X 14" duct opening (measured at the opening), with actual outer dimensions of 16. 5" W x 34. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 13. 75" x 31. 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