Merv 13 Pleated Air Filter - 21 1/4" x 23 1/2" x 1" Quantity:12-pack Includes one Frame and PACK

Includes one Frame and PACK of 6 pads

Unlike some permanent custom air filters

from the air stream

This is designed to fit into 1" Return Air Grilles

Merv 13 Pleated Air Filter - 21 1/4" x 23 1/2" x 1" Quantity:12-pack Includes one Frame and PACKAny 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.