58L-421IBU: 100 PPM CARBON MONOXIDE, 25 PPM HYDROGEN SULFIDE, 0.9 % ISOBUTANE (50 % LEL) , 18 % OXYGEN, BALANCE NITROGEN CONTAINED IN A 58 LITER ALUMINUM CYLINDER WITH A C-10 CONNECTION. SDS # G-1415, UN1956 |
Calibration Certificate NIST, Made in the USA