Industrial Scientific Calibration Gas Cylinder; Gas Type: Sulfur Dioxide; Cylinder Capacity: 58L; Gas Mixture: 10 PPM SO2; Maximum Pressure: 500 psi; Cylinder Diameter: 3-1/2 Inch; Cylinder Height: 14-1/4 Inch; Accuracy: +/-10%; Background Gas: Nitrogen; Calibration Certificate: NIST; Connection: 5/8-18 UNF; Cylinder Material: Aluminum Alloy