28" x 30" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 14in diameter 2 recessed screw holes on

2 recessed screw holes on each side with screws included

Universal Fit – Dimensions of 6-3/8" wide x 3-1/2" high x 3" deep make it compatible with most standard thermostat models

+ Product Details Size – 14"w X 32"h is the size for the duct opening measurement only

Actual Filter Size – 21 3/4"w x 17 3/4" x 1"

and extends HVAC system life

28" x 30" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 14in diameter 2 recessed screw holes on+ Product Details Perfect Fit & Easy Sizing Designed for a 28" x 30" OR 30" x 28" duct opening (measured at the opening), with actual outer dimensions of 30. 5" W x 32. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 27. 75" x 29. 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