22" x 34" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 12" Round Duct Pipe actual front end outer dimensions

actual front end outer dimensions are 8" diameter

+ Product Description Protect your thermostat with the durable and tamper-proof Beige Metal Thermostat Guard

+ Product Details Size – 12"w X 26"h is the size for the duct opening measurement only

+ Product Details Size - 30"w X 14"h is the size for the duct opening measurement only

+ Product Details Outer dimensions: 7

22" x 34" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 12" Round Duct Pipe actual front end outer dimensions+ Product Details Perfect Fit & Easy Sizing Designed for a 22" x 34" OR 34" x 22" duct opening (measured at the opening), with actual outer dimensions of 24. 5" W x 36. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 21. 75" x 33. 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