Over the years, breathing air cylinders have been providing SCBA userswith a supply of fresh air. The original cylinders were made of steel andquite heavy. But today, advances in technology have enabled cylindersto become much lighter and less burdensome to the SCBA wearer.3M Scott offers a complete assortment of cylinders to meet the needs and demands of all SCBA users, from aluminum cylinders for infrequently used SCBA to carbon-wrapped cylinders for daily use. In addition, 3M Scott offers cylinders rated at 5500 psig (an industry first), which are available in 30-min, 45-min, 60-min and 75-min durations. To complement our cylinder offering, 3M Scott offers several solutions to help prevent damage and improve durability of the cylinder.