20" x 14" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Color_R-4.2 Yellow Adjustable airflow control - by

Adjustable airflow control - by rotating the middle disk

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

+ Product Details Size - 20"w X 22"h X 2"d (for duct opening measurement only)

Installation Location – Sidewall and ceiling

+ Product Description Protect and secure your thermostat with this high-quality Clear Plastic Thermostat Guard

20" x 14" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Color_R-4.2 Yellow Adjustable airflow control - by+ Product Details Perfect Fit & Easy Sizing Designed for a 20" x 14" OR 14" x 20" duct opening (measured at the opening), with actual outer dimensions of 22. 5" W x 16. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 19. 75" x 13. 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