8" x 10" or 10" x 8" Cube Core Eggcrate Return Air Filter Grille for 1" Filter - Aluminum - White [Outer Dimensions: 10.5" X 12.5"] Color_Black One model suits both T-Bar

One model suits both T-Bar and Drywall installations

Design – Made of strong durable ABS plastic

+ Product Details Size - 18"w X 24"h is the size for the duct opening measurement only

+ Product Details Size – 15" Corner Baseboard Grille - White - HVAC corner vent cover

The total outer size of this grille is the listed size plus 2 and 5/85"

8" x 10" or 10" x 8" Cube Core Eggcrate Return Air Filter Grille for 1" Filter - Aluminum - White [Outer Dimensions: 10.5" X 12.5"] Color_Black One model suits both T-Bar+ Product Details Perfect Fit & Easy Sizing Designed for a 8" x 10" or 10" x 8" duct opening (measured at the opening), with actual outer dimensions of 10. 5" W x 12. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 7. 75" x 9. 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