GASCO 17L-318, Calibration Gas,50 PPM Carbon Monoxide, CH4 50% LEL 2.5% by volume, Oxygen 12.0%, 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 Brand 17L-318, GASCO Calibration Gas is Made in the USA, Easy Ordering, Fast Shipping, Excellent Customer Service, Largest Selection in the USA