Umarex High-Grade CO2 Cartridges are designed for use with pellet guns, BB guns, and airsoft guns, offering a consistent and reliable power source for your air gun adventures. These round cartridges, measuring 7.5 inches in width and 3.38 inches in height, are made from a blend of materials and come in a colorful design. With a weight of 12 grams each, these high-grade CO2 cartridges are suitable for both male and female users and are the perfect accessory for outdoor sports enthusiasts looking to enhance their shooting experience.