GASCO 17L-303E, Carbon Monoxide 50 PPM, Methane 1.62% = (50% LEL) Propane simulant, Oxygen 18%, Balance N2 contained in a 17 Liter Disposable Steel Cylinder, For Use with Any and All Gas Detectors, Cylinder Connection CGA 600, Calibration Certificate NIST, Made in the USA
Order GASCO 17L-303e, GASCO Calibration Gas is Made in the USA, Easy Ordering, Fast Shipping, Excellent Customer Service, Largest Selection in the USA