A+2000 Washable Electrostatic Permanent Custom Air Filter - 21" x 25" x 1" Quantity:Default This is designed to fit

This is designed to fit into 1" Return Air Grilles

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

We can make custom air filters in heights and widths ranking from 6 inches to 36 7/8 inches with increments in 8ths of an inch

Includes one Frame and PACK of 6 pads

A+2000 Washable Electrostatic Permanent Custom Air Filter - 21" x 25" x 1" Quantity:Default This is designed to fitYou 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