GASCO 116-1 Oxygen (Zero Air) Calibration Gas, 20.9% O2 in a 116 Liter Cylinder, Connection Type C-10, Cylinder Material: Aluminum, Certification NIST, Made in the USA

Zero Air (20.9 % Oxygen balance Nitrogen) contained in a 116 Liter Aluminum cylinder With a C-10 connection. Contains Less than 2 PPM H20, 0.1 PPM THC, 1 PPM CO2, and 1 PPM