https://us.msasafety.com/g1-scba?gclid=Cj0KCQjwnqH7BRDdARIsACTSAdvKhZRFGrzcgpkIR7YHx-9ctb4TtxwGj51rZDRzVXh8-5R1lcHQ-q8aAtW8EALw_wcB

Choose from a complete line of air cylinders, including lightweight carbon, economical aluminum or affordable composite. Choose from eight different cylinders, each designed especially for MSA Air Masks. Available in high and low pressure with air supply durations of 30, 45 and 60 minutes, and 4500 or 5500 psi. Optional custom logos available.