28" x 8" Cube Core Eggcrate Return Air Filter Grille for 1" Filter RV Mobile Home Actual Filter Size – 11

Actual Filter Size – 11 3/4"w x 33 3/4" x 1"

+ Product Details Size – 14" X 4" is the size for the duct opening (floor/vent hole) measurement only

+ Product Details Size – 12" x 14" or 14" x 12" is the size for the duct opening measurement only

Design – Premium plated finish and modern contempo design forming a luxurious & impressive piece for your home

+ Product Details Perfect Fit & Easy Sizing - Designed for a 14" x 10" or 10" x 14" duct opening (measured at the opening)

28" x 8" Cube Core Eggcrate Return Air Filter Grille for 1" Filter RV Mobile Home Actual Filter Size – 11+ Product Details Perfect Fit & Easy Sizing Designed for a 28" x 8" OR 8" x 28" duct opening (measured at the opening), with actual outer dimensions of 30. 5" W x 10. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 27. 75" x 5. 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