A+2000 Washable Electrostatic Permanent Custom Air Filter - 6" x 12 3/8" x 1" Quantity:Default with each stage capturing progressively

with each stage capturing progressively smaller particles inside the filter

these can be purchased in any conceivable size

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from the air stream

A+2000 Washable Electrostatic Permanent Custom Air Filter - 6" x 12 3/8" x 1" Quantity:Default with each stage capturing progressivelyYou 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