Koch M57W3B221-1/8�21-1/8�2-7/8 MiniPleat HEPA Air Filter99.99% voomi_id_61777 making it reliable and efficient The advanced thermostatic element

Koch M57W3B221 1 8�21 1 8�2 7 8 MiniPleat HEPA Air Filter99.99% voomi_id_61777 making it reliable and efficient The advanced thermostatic element making it reliable and efficient for prolonged use Purge Timing: 0 sec Prepurge & 15 sec Inter purge Reverse Gel Seal Features Constructed with the built in gel channel located at the back of the upstream side of the filter Designed for housings and ducted modules equipped with a "knife edge" seal Excellent replacement filter for permanently installed ducted ceiling modules Features: Anodized biotech laboratories and other environments where control and removal of airborne contaminants is of paramount importance in the protection of people