3M 837731 Adflo system with Heavy Duty battery pack

Adflo drive unit with self-regulating QRS breathing hose, airflow indicator, pre-filter, spark trap, particle filter, reinforced battery, belt and charger. Benefits: When used with the appropriate filter, the Adflo system provides effective protection against particles and gases - all in one system. Gas canisters are sold as separate accessories. Air always flows at a constant nominal rate of 170 liters per minute regardless of the charge level of the accumulator or the amount of particles in the filter.