12" x 10" or 10" x 12" Cube Core Eggcrate Return Air Filter Grille for 1" Filter - Aluminum - White [Outer Dimensions: 14.5" X 12.5"] Round Damper Ring Looks like it was just

Looks like it was just waxed

32"w X 8"h Is The Size For The Duct Opening Measurement Only

+ Product Details Size – 36"w X 34"h is the size for the duct opening measurement only

+ Product Details Size - 30"w X 14"h is the size for the duct opening measurement only

+ Product Details Size – 18" Wooden Corner Baseboard Grille

12" x 10" or 10" x 12" Cube Core Eggcrate Return Air Filter Grille for 1" Filter - Aluminum - White [Outer Dimensions: 14.5" X 12.5"] Round Damper Ring Looks like it was just+ Product Details Perfect Fit & Easy Sizing Designed for a 12" x 10" or 10" x 12" duct opening (measured at the opening), with actual outer dimensions of 14. 5" W x 12. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 11. 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