Sundstrom SR 221 Pre Filters (Pack of 80)

For use with the Sundström SR 500 powered respirator, SR 200 full-face respirator mask, and SR 100 and SR 90-3 half-face respirator masks. Can extend the service life and reduce operating costs of the main filter by capturing large particles. Can be used with particulate and combination filters which are available separately. For use with a pre-filter holder which are available separately. Parts should be checked regularly for signs of wear and damage, and replaced as and when necessary.