Round PFT Filter for SensorMedics, 2200,2400, 2450, 2800, others, Including Vmax, Keystone I & II, Pail, Cybermedics Moose, Gould 5004Round PFT Filter for SensorMedics, 2200,2400, 2450, 2800, others, Including VmaxSKU: 5554100$137.50PriceShipping Terms PolicyQuantity*Add to CartFilter Specifications Bacterial Filtration Effeciency 99.99% Viral Filtration Effeciency 99.99% Dead Space Approx. 35ml (cc) Resistance 0.23 cm H2O/L/sec approx. Material K resin case Electrostat® fitrate medium Nelson Labs Test Results