26" x 28" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 18" Round Duct Pipe 75" Deep - Will Fit

75" Deep - Will Fit All Garrage Doors - Insulated And Non Insulated Garrage Doors [The Hole In The Door SHould Be: 15 ¼ x 9 ¾]

Design – Individually adjusting curved blades for better air flow control

+ Product Details Perfect Fit & Easy Sizing - Designed for a 12" x 32" or 32" x 12" duct opening (measured at the opening)

Design – Full Control Vertical/Horizontal Air flow Direction

the T-Bar vent covers

26" x 28" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 18" Round Duct Pipe 75" Deep - Will Fit+ Product Details Perfect Fit & Easy Sizing Designed for a 26" x 28" OR 28" x 26" duct opening (measured at the opening), with actual outer dimensions of 28. 5" W x 30. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 25. 75" x 27. 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