32" x 10" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w14h14 + Product Details Size -

+ Product Details Size - 28"w X 18"h is the size for the duct opening measurement only

+ Product Details Outer dimensions: 15

High diffusion induction rates result in rapid temperature and velocity equalization of the mixed air mass well above the zone of occupancy

It has an outer surface made of high-quality aluminum foil and an inner surface made of metalized PET with inside high-tensile spring steel wire

Its removable face allows hassle-free cleaning

32" x 10" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w14h14 + 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