Methane Balance: Air or Nitrogen Range: 10 ppm - 2.5% vol. Symbol: CH4 Warranty: 48 Months Product Options Concentration: -- Please Select -- 10 ppm | Balance Air 100 ppm | Balance Air 100 ppm | Balance Nitrogen 1000 ppm | Balance Air 20 ppm | Balance Nitrogen 20% LEL, 1% Vol. Balance Air 20% vol. Balance Nitrogen 30% LEL 1.5% Vol. Balance Air 300 ppm | Balance Air 5 ppm | Balance Air 5 ppm | Balance Nitrogen 50 ppm | Balance Air 50 ppm | Balance Nitrogen 50% LEL, 2.5% Vol. Balance Air 50% LEL, 2.5% vol. Balance Nitrogen 500 ppm | Balance Air 99.9999% vol. Cylinder Size: -- Please Select -- 10 Liter Aerosol Bump 103 Liter Steel 17 Liter Steel 221 Liter Steel 34 Liter Steel Price: from $44.00 Updating cart...