GASCO 103l-301A, Calibration Gas Mixture, 50% LEL methane, 50 ppm Carbon Monoxide, 18% Oxygen, Balance Nitrogen Contained in a 103 Liter Disposable Steel Cylinder, Cylinder Connection C-10, Calibration Certificate NIST, Made in the USA
Order 103L-301a, from Cal Gas Direct Incorporated, GASCO Calibration Gas is Made in the USA, Easy Ordering, Excellent Customer Service, Largest Selection in the USA