A+2000 Washable Electrostatic Permanent Custom Air Filter - 21" x 21" x 1" Quantity:Default degrade and restrict air flow

degrade and restrict air flow

the greater it's resistance to airflow

such as dust

with each stage capturing progressively smaller particles inside the filter

Includes one Frame and PACK of 6 pads

A+2000 Washable Electrostatic Permanent Custom Air Filter - 21" x 21" x 1" Quantity:Default degrade and restrict air flowYou may know them as washable air or even permanent air filters; some just refer to them as electrostatic filters. Either way, the "A+2000" brand Permanent Washable Electrostatic custom air filters are truly quality products, built to last a lifetime. Unlike some permanent custom air filters, the A+2000 uses no foam that may clog, degrade and restrict air flow, so it can provide a lifetime of dependable service. And there are no metal parts that could