GASCO 17L-315, Calibration Gas Mix, Carbon Monoxide 50 PPM, Methane 50% LEL, Oxygen 17%, Balance Nitrogen 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 original Part #17l-315, GASCO Calibration Gas is Made in the USA, Easy Ordering, Fast Shipping, Excellent Customer Service, Largest Selection in the USA!