These accessories help ensure proper air quality and deliverability when used with MSA constant flow airline systems. Filters remove 99% (minimum) of >0.3 micron particulate for up to 1000 hours of use. Air supply hoses deliver respirable air from 8 to 5 feet in temperatures from -25¬?F to 212¬?F (depending on type). And cylinder cascade systems deliver single-source air to one or more workers.