Umarex 88G CO2 Cylinders - 2 Pack - These Umarex-Walther 88 gram CO2 cartridges comes two per pack. Great quality CO2 runs clean in your airguns and fit air rifles such as the Umarex AirJavelin, Umarex Fusion 2, 850 Air Magnum and 850M2. 88-gram CO2...