12 x 6 Merv 2 HVAC Pleated Filter, 12-Pack return filter + Product Details Size –

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

+ Product Details Size – 18"w X 10"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 16 5/8" width X 28 5/8" height

Designed with a ring base for flexible installation

+ Product Details Size – 26"w X 10"h is the size for the duct opening measurement only

12 x 6 Merv 2 HVAC Pleated Filter, 12-Pack return filter + 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