(WARNING: THIS PRODUCT CONTAINS ONE OR MORE CHEMICALS KNOWN TO THE STATE OF CALIFORNIA TO CAUSE CANCER AND BIRTH DEFECTS OR OTHER REPRODUCTIVE HARM. WASH HANDS AFTER HANDLING.)  Brew at home with these premium aluminum CO2 cylinders.. Clean corrosion-resistant and lightweight. Highly corrosion-resistant interior and exterior ideal for wet gases such as CO2.. Tanks perform well at low temperatures.. Up to 40 percent lighter than comparable steel Tanks.. Consistent tare weight thick consistent walls resist damage.. Brushed external surface provides a low-maintenance finish.. Tanks cycle-tested in excess of 100 000 cycles at service pressure.. Minimum burst pressure tested to 2.5 times service pressure without failure.. Item Weight - 7.55 lbs.