Crosman Airsource 88g CO2 Cartridges, 2pk: * Compatible with any device that requires an 88g CO2 cartridge * Material: metal * CO2 power lets you shoot in rapid succession * No manual pumping needed between shots DISCLAIMER: You must be 18 years old to purchase this product. The sale or shipment of this product to residents of California, Connecticut, District of Columbia, Delaware, Illinois, Michigan, Massachusetts, New Jersey, New York, North Carolina, Puerto Rico and Canada is prohibited. Check your local laws before ordering this product. We recommend the use of protective eyewear whenever using or near the use of this item.