Isobutylene Balance: Air Range: 10-250 ppm Symbol: C4H8 Warranty: 48 Months Product Options Concentration: -- Please Select -- 10 ppm | Balance Air 100 ppm | Balance Air 50 ppm | Balance Air 500 ppm | Balance Air 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...