Air Science Purair Basic and RX Series Pre-Filter, Pack of 6

The Purair Basic Ductless Fume Hood Pre-Filter is an electrostatic pre-filter that is 99.5 % effective. It is accessible from inside the chamber to contain the release of any particulates that it traps. The Pre-Filter can be changed while the unit is operating to prevent operator exposure to chemical vapors. Use alongside the main filter to remove contaminants from the air.