Zero Air Calibration Gas 103 Liter Cylinder 20.9 Oxygen
GASCO 103L-1 Zero Air 103 Liter Cylinder
(20.9 % Oxygen balance Nitrogen) Contains Less than 2 PPM H20, 0.1 PPM
THC, 1 PPM CO2, and 1 PPM CO, Cylinder Type: Steel, Connection Type: C-10, Certification NIST, Made in USA