250 ppm CO, 50% LEL Methane, 125 LEL H2S, 18% O2, Balance: N2 Product Options Cylinder Size: -- Please Select -- 10 Liter Aerosol Bump 116 Liter Aluminum 34 Liter Aluminum 58 Liter Aluminum 74 Liter Aluminum Price: from $59.00 Updating cart...