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Ships within 48 hours · Estimated delivery Sep 14 - Sep 19
The included eight-tumbler lock and supplied key provide secure access
+ Product Details Size – 12"w X 18"h is the size for the duct opening measurement only
75"H – fits a 18" X 18" duct opening
Design - special "V" shaped louvers ensure 100% view block while ensuring easy un-restricted air flow
actual front end outer dimensions are 7
20" x 26" Cube Core Eggcrate Return Air Filter Grille for 1" Filter fixed bar The included eight-tumbler lock and+ Product Details Perfect Fit & Easy Sizing Designed for a 20" x 26" OR 26" x 20" duct opening (measured at the opening), with actual outer dimensions of 22. 5" W x 28. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 19. 75" x 25. 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