Merv 11 Pleated Air Filter - 9" x 11 3/8" x 1" Quantity:12-pack the "A+2000" brand Permanent Washable

the "A+2000" brand Permanent Washable Electrostatic custom air filters are truly quality products

Filtering inserts are anti-microbial and are more efficient in capturing particles

Includes one Frame and PACK of 6 pads

This is designed to fit into 1" Return Air Grilles

Either way

Merv 11 Pleated Air Filter - 9" x 11 3/8" x 1" Quantity:12-pack the "A+2000" brand Permanent WashableAny 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.