- Dual stage flame laminated foam filter built for extremely dusty conditions
- Fully open-cell structure for highest airflow and maximum protection
Beta -- 250 RR -- (2013, 2016, 2018, 2015, 2017, 2014); Beta -- 390 RR -- (2016, 2015, 2014, 2013); Beta -- 250 RR 2T -- (2017, 2018, 2013, 2016, 2014, 2015); Beta -- 350 RR -- (2014, 2016, 2015); Beta -- 450 RR 4T -- (2015, 2016, 2017, 2013, 2014); Beta -- 350 RR S 4T -- (2018, 2017); Beta -- 350 RR 4T -- (2013, 2014, 2015, 2018, 2017, 2016); Beta -- 450 RR -- (2016, 2014, 2015, 2013); Beta -- 390 RR 4T -- (2014, 2016, 2015, 2018, 2013, 2017); Beta -- 525 RR -- (2015, 2014, 2016, 2013)