Merv 13 Pleated Air Filter - 17 7/8" x 19 5/8" x 1" Quantity:12-pack if not you can measure

if not you can measure it or check the HVAC unit and the owner‰۪s manual

The secret behind the A+2000‰۪s custom air filters performance is the patented stage loading/peak and valley design

Finally they are factory made so you don‰۪t have to deal with the hassle of trying to cut and size your custom air filters and they come with a full warranty

Simply cut a hole

No holes needed for installation in coil area

Merv 13 Pleated Air Filter - 17 7/8" x 19 5/8" x 1" Quantity:12-pack if not you can measureAny Kind of Filter's Extended Surface Pleated Filters outperform ordinary furnace filters with medium efficiency and are designed for lower pressure drop, and long service life which reduces HVAC equipment maintenance and energy costs. A higher MERV rating means that the air filter that you are about to purchase possesses a higher amount impurity filtration ability than your ordinary filter.