Merv 8 Pleated Air Filter - 20" x 20" x 1" Quantity:4-pack from the air stream

from the air stream

PACK of 6 pads for Pad and Frame Air Filters

these can be purchased in any conceivable size

This is designed to fit into 1" Return Air Grilles

the greater it's resistance to airflow

Merv 8 Pleated Air Filter - 20" x 20" x 1" Quantity:4-pack from the air streamAny 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.