34" x 12" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Color_Red Oak Wood Design – removable door/face for

Design – removable door/face for easy filter change & cleaning - uses a 1" thick filter

+ Product Details Size – 8"w X 20"h is the size for the duct opening measurement only

+ Product Details Perfect Fit & Easy Sizing - Designed for a 8" x 6" or 6" x 8" duct opening (measured at the opening)

these louvers are built to last

Just run your finger along the edge of the top plate and you will find a smooth finished surface

34" x 12" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Color_Red Oak Wood Design – removable door/face for+ Product Details Perfect Fit & Easy Sizing Designed for a 34" x 12" Or 12" x 34" duct opening (measured at the opening), with actual outer dimensions of 36. 5" W x 14. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 33. 75" x 11. 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