Umarex CO2 Cartridge 12 Gram Package of 30

These premium .177 steel BBs manufactured by Hornady have a black annodized finish and they are 100% inspected. The finish provides reduced surface variation for maximizing speed accuracy and distance traveled. - Anodized finish - Less friction - Improves velocity distance & accuracy - 1500 BBsSpecifications and Features:CO2 quality is critically important to the health of your air gun; Ensure a lifetime of performance with this clean CO2 from Umarex.Tested and proven clean; Doesn't dirty your air gun valves.Number of rounds per capsule depends on the specific air gun.