28" x 36" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Fixed Blades with Damper Watch the video

Watch the video

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]

Built-In Locking System – Comes with a permanently attached eight-tumbler lock and a supplied key for added security

+ Product Details Outer dimensions: 13

Ideal for Walls & Ceilings: Designed for seamless installation in standard 14" X 8" duct openings

28" x 36" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Fixed Blades with Damper Watch the video+ Product Details Perfect Fit & Easy Sizing Designed for a 28" x 36" OR 36" x 28" duct opening (measured at the opening), with actual outer dimensions of 30. 5" W x 38. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 27. 75" x 35. 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