HEPA-PLEAT II® minipleat filters offer outstanding performance and energy cost saving characteristics. Our separatorless minipleat design allows much more filter media into the same area conventional corrugated separator filters occupy. More media = extended filter life and less static pressure. In fact, at a 100 F.P.M. velocity, measured volumetrically, a pressure drop as low as 0.19" W.G. is obtainable in cleanroom applications. Manufactured in hepa and ulpa efficiencies ranging up to and including 99.99999+% @ 0.12 microns. These advanced and versatile filters are DOP, PSL, scan and/or laser tested as required.