Bump Gas Gas Name Carbon Monoxide Methane Oxygen Gas Mixture 100 ppm CO 2.5 Percent CH4 (50 Percent LEL) 19 Percent O2 Background Gas Nitrogen Cylinder Capacity 11 L Cylinder Material Aluminum For Use With Mfr No 906-00000-08 906-00000-09 907-GRNGR-01 907