Self-contained breathing apparatus whose duration depends on the model and on the cylinder mounted: 3 or 6 liter 300 bar steel or 6,8 or 9 liter 300 bar composite cylinders. RN can be supplied with mask and demand valve type A (EN148/3) or with mask and demand valve type BN (snap-in connector and  threaded connector EN148/1 for filters). The breathing apparatus is ideal for fire brigades and rescue teams for fire-fighting and activities in extremely polluted environments or in oxygen deficiency.