A+2000 Washable Electrostatic Permanent Custom Air Filter - 16 1/2" x 21 1/2" x 1" Quantity:Default And there are no metal

And there are no metal parts that could lead to corrosion or oxidation within the filter

The secret behind the A+2000‰۪s custom air filters performance is the patented stage loading/peak and valley design

Includes one Frame and PACK of 6 pads

some just refer to them as electrostatic filters

Filtering inserts are shipped in an easily stored packet

A+2000 Washable Electrostatic Permanent Custom Air Filter - 16 1/2" x 21 1/2" x 1" Quantity:Default And there are no metalYou 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