32" x 10" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 12" Round Duct Pipe + Product Details Size –

+ Product Details Size – 8"w X 14"h is the size for the duct opening measurement only

+ Product Details Size - 12"w X 34"h is the size for the duct opening measurement only

3 * insulation density is 30kgs/cbm = 0

75" width X 13

+ Product Details Perfect Fit & Easy Sizing - Designed for a 16" x 16" duct opening (measured at the opening)

32" x 10" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 12" Round Duct Pipe + Product Details Size –+ Product Details Perfect Fit & Easy Sizing Designed for a 32" x 10" OR 10" x 32" duct opening (measured at the opening), with actual outer dimensions of 34. 5" W x 12. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 31. 75" x 9. 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