12" X 8" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER - EASY AIRFLOW - LINEAR BAR GRILLES w24h24 the second number represents the

the second number represents the width

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

This thoughtful design ensures optimal air circulation for your HVAC system

+ Product Details Size - 24"w X 6"h is the size for the duct opening measurement only

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12" X 8" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER - EASY AIRFLOW - LINEAR BAR GRILLES w24h24 the second number represents the+ Product Details Size 12"w X 8"h is the size for the duct opening measurement only, [Outer Dimensions: 14. 5"w X 10. 5"h] Actual Filter Size 11 3 4"w x 7 3 4" x 1" High Quality High quality rust free, strong aluminum construction with smooth finished edges for easy and safe use; Filter grille features a user friendly plastic latch that requires no screwdriver for opening. Installation Location Sidewall and ceiling. Design Heavier gauge than needed,