10" x 16" or 16" x 10" Cube Core Eggcrate Return Air Filter Grille for 1" Filter - Aluminum - White [Outer Dimensions: 12.5" X 18.5"] w28h28 Designed for sidewall and ceiling

Designed for sidewall and ceiling installation with included screws

Actual Front End Outer Dimensions Are 34" Width X 10" Height - SEE IN DESCRIPTION HOW TO MEASURE A GRILLE

+ Product Details Size - 26"w X 30"h is the size for the duct opening measurement only

Mounted with a frame and bayonet joint

40" x 16" Aluminum Spiral Duct Air Vent Grille Cover - Fully Adjustable Double Deflection HVAC Air Supply

10" x 16" or 16" x 10" Cube Core Eggcrate Return Air Filter Grille for 1" Filter - Aluminum - White [Outer Dimensions: 12.5" X 18.5"] w28h28 Designed for sidewall and ceiling+ Product Details Perfect Fit & Easy Sizing Designed for a 10" x 16" or 16" x 10" duct opening (measured at the opening), with actual outer dimensions of 12. 5" W x 18. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 9. 75" x 15. 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