The Huntego 20 Gauge CleanShot Shoot-Thru Gun Bore Cleaner is a yellow barrel cleaner designed specifically for 20 gauge shotguns. This 4 pack of shells is made in the United States and comes with a California Prop 65 Warning, ensuring its safety and quality standards are met. This product is perfect for hunters and firearm enthusiasts looking to maintain the cleanliness and performance of their guns, making it a reliable and efficient solution for gun maintenance.