A+2000 Washable Electrostatic Permanent Custom Air Filter - 9 5/8" x 10 7/8" x 1" Quantity:Default and the greater the pressure

and the greater the pressure drop it creates

The "Practical Pleat" contains over 500% greater surface area than a MERV 10 one-inch pleat

the A+2000 uses no foam that may clog

these can be purchased in any conceivable size

from the air stream

A+2000 Washable Electrostatic Permanent Custom Air Filter - 9 5/8" x 10 7/8" 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