24" x 20" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Width_20in 1/4" - 6518 PSI

1/4" - 6518 PSI

High Quality – High-quality steel with counter-sunk screw holes (screws included) and no sharp edges

+ Product Details Size - 4"w X 36"h is the size for the duct opening measurement only

16" Circular Round Aluminum HVAC Supply Grille Air Diffuser - With Butterfly Damper - Vent Duct Cover

Experience enhanced indoor comfort with our 6" Butterfly Damper

24" x 20" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Width_20in 1/4" - 6518 PSI+ Product Details Perfect Fit & Easy Sizing Designed for a 24" x 20" OR 20" x 24" duct opening (measured at the opening), with actual outer dimensions of 26. 5" W x 22. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 23. 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