The ValleyLab E35115 Airforce Protection Plus Pre-Filter (#901205) is compatible with the ValleyLab AirForce System.
The replaceable pre-filter removes particles down to 0.1 microns at 99.9995% efficiency, thus capturing a large percentage of the particulate matter. This pre-filter ensures the optimum performance and useful life of the more expensive ULPA filter used with a smoke evacuator.
Surgimedics prefilters are designed to provide visual indication of it needing to be replaced. When you can see the top layer of the filter media covered with dark brown or black sediment, it's time to change the prefilter.
The useful life of the prefilter is normally three to five procedures. It can be easily replaced, even mid-procedure if necessary.