RKI Instruments Cylinder, Isobutylene 100 ppm/H2S 25 ppm/CO 50 ppm/CH4 50% LEL/O2 12% in N2, 58AL

With a 58 liter volume, this aluminum cylinder contains 100 ppm isobutylene, 25 ppm hydrogen sulfide, 50 ppm carbon monoxide, 50% LEL methane, 12% O2, and balance nitrogen.