12x12x6. The Airex Micro Air 99.97% and 99.99% efficient HEPA filters are used in many applications including hospitals, bio-medical , manufacturing process and clean rooms. Each Industrial Grade Filter is manufactured and tested in accordance with Recommended Practice IEST-RP-CC-034-1. The Micro Air is available in a variety of frame materials including particleboard, plywood, aluminum, galvanized steel and stainless steel. The frame style can be manufactured with or without headers and with or without flanges. The filter media is a continuous sheet of non-woven water resistant fiberglass media, DOP tested with a minimum efficiency of 99.97%. The filter pack is available either pleated over .0015 thick corrugated aluminum separators, or as a separator-less filter pack (Pureform style) which is a high capacity rated at 2000 CFM. The filter pack is bonded to the frame using a fire-retardant urethane (IU) or a polyurethane foam (IL). (SU) is a urethane that has been scan tested to 99.99% on 0.30 micrometers. A variety of gaskets are also available including neoprene, silicone sponge, woven glass and BLU- JEL Seal. Available with or without aluminized expanded metal or stainless steel faceguards in 1100 CFM or 2000 CFM.