GASCO Equivalent for Industrial Scientific 1810-9191 Calibration Gas 25% LEL Pentane, 18% Oxygen, 100 ppm Carbon Monoxide, 25 ppm Hydrogen Sulfide, Balance Nitrogen contained in a 34 Liter Disposable Aluminum Cylinder, For Use with Any and All Gas Detectors, Cylinder Connection C-10, Calibration Certificate NIST, Made in the USA (411-18 mix)

DOES NOT INCLUDE RFID iCARD