The SR 221 prefilter should always be used together with particulate filter, chemical cartridges and combined filters. The prefilter protects the main filter against premature clogging by larger particles, for example dirt and dust.
- Non-classified filter designed to prolong the life of the P100 particulate filter
- Mechanically woven Polyester
- Frequently exchanging the prefilter will prolong the life of the P100 particulate filter by catching larger particles and preventing premature clogging
- NIOSH approved non classified prefilter
- Please note this product does NOT come with Pre Filter holder or cartridges