Breathe easier in immediate danger to life and health atmospheres with SCBA and breathing air cylinders from Grainger. There are cylinders that provide breathable air for 10, 15, 45 and 60 minutes. They weigh anywhere from 6.4 lbs. to 21.5 lbs. when empty. SCBA and breathing air cylinders are made from aluminum, carbon, carbon fiber, fiberglass and steel material.