12 x 24 Merv 2 HVAC Pleated Filter, 12-Pack 18" Diameter + Product Details Size -

+ Product Details Size - 24"w X 14"h X 2"d (for duct opening measurement only)

+ Product Details Size – 6" x 34" or 34" x 6" is the size for the duct opening measurement only

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+ Product Details Perfect Fit & Easy Sizing - Designed for a 34" x 18" Or 18" x 34" duct opening (measured at the opening)

12 x 24 Merv 2 HVAC Pleated Filter, 12-Pack 18" Diameter + Product Details Size -The W shaped pleats enlarge the surface area for capturing dirt and particles for cleaner air Get 3 MERV 2 AC filters per pack while only paying for 2 Dimensions are interchangeable for rectangular filters, but not square ones Let air circulate and cycle through your HVAC without obstructions