600L-150a-9900 | X02AI99CA600004 | 9900PPM METHANE BALANCE AIR SIZE 600RAL CERTIFIED STANDARD-SPEC CGA 590
CH4 Calibration Gas in Air contained in a 600 Liter Aluminum Disposable Cylinder, For Use with Any and All Gas Detectors, Cylinder Connection: CGA 590, Calibration Certificate NIST, Made in the USA