Merv 13 Pleated Air Filter - 17 1/2" x 35 1/4" x 1" Quantity:12-pack The filtering media consists of

The filtering media consists of two layers of Stainless Steel roll formed baffles

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

The "Practical Pleat" contains over 500% greater surface area than a MERV 10 one-inch pleat

Either way

Merv 13 Pleated Air Filter - 17 1/2" x 35 1/4" x 1" Quantity:12-pack The filtering media consists ofAny 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.