A+2000 Washable Electrostatic Permanent Custom Air Filter - 18 1/8" x 22 1/4" x 1" Quantity:Default and the greater the pressure

and the greater the pressure drop it creates

so it can provide a lifetime of dependable service

PACK of 6 pads for Pad and Frame Air Filters

They are easy to install with custom air filters made to the sizes that you specify

This design enables A+2000 custom air filters to maintain performance over the years

A+2000 Washable Electrostatic Permanent Custom Air Filter - 18 1/8" x 22 1/4" x 1" Quantity:Default and the greater the pressureYou 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