GASCO 17L-325, Calibration Gas, Carbon Monoxide 35 PPM, Pentane 10% LEL, Oxygen 18%, 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
GASCO 17L-325 Calibration Gas is Made in the USA, Easy Ordering, Fast Shipping, Excellent Customer Service, Largest Selection in the USA