Gasco 103L-17A-25 Butane 25% LEL, 0.45% Vol., 103 Liter Balance Air
GASCO
103L-17A-50 50% LEL (0.95% by Volume) Butane Balance Air Calibration
Gas in a 103 Liter Disposable Steel Cylinder, Cylinder Connection C-10,
Calibration Certificate NIST, Made in the USA