6" x 20" or 20" x 6" Cube Core Eggcrate Return Air Filter Grille for 1" Filter - Aluminum - White [Outer Dimensions: 8.5" X 22.5"] Powder Coated Actual Filter Size – 27

Actual Filter Size – 27 3/4"w x 15 3/4" x 1"

The permanently attached eight-tumbler lock with a supplied key adds an extra layer of security

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

+ Product Details Size – 18"w X 28"h is the size for the duct opening measurement only

+ Product Details Size – 25"w X 18"h is the size for the duct opening measurement only

6" x 20" or 20" x 6" Cube Core Eggcrate Return Air Filter Grille for 1" Filter - Aluminum - White [Outer Dimensions: 8.5" X 22.5"] Powder Coated Actual Filter Size – 27+ Product Details Perfect Fit & Easy Sizing Designed for a 6" x 20" or 20" x 6" duct opening (measured at the opening), with actual outer dimensions of 8. 5" W x 22. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 5. 75" x 19. 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