16" x 6" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Compatible with Duct 10" + Product Details Size –

+ Product Details Size – 6" x 22" or 22" x 6" is the size for the duct opening measurement only

+ Product Details Size – 26" x 26" is the size for the duct opening measurement only

Easy Installation – Just pop the diffuser right into the wall duct hole and the side springs will hold it right into place so that it looks clean

+ Product Details Size - 26"w X 30"h is the size for the duct opening measurement only

+ Product Description The Clear Plastic Thermostat Guard provides reliable protection and security for your thermostat while ensuring optimal functionality

16" x 6" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Compatible with Duct 10" + Product Details Size –+ Product Details Perfect Fit & Easy Sizing Designed for a 16" x 6" OR 6" X 16" duct opening (measured at the opening), with actual outer dimensions of 18. 5" W x 8. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 15. 75" x 5. 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 Made