This is Aguila 12 Gauge mini-shell # 7 1/2 Bird Shot Ammo. This ammo is loaded with 5/8oz of #7 1/2 shot and is only 1 1/2" long. This ammo has a very light recoil, so it is great for training kids to shoot with a 12 gauge. This ammo travels at 1175 FPS and is great for skeet. With this ammo your typical shotgun can hold 33% to 50% more rounds legally and have a lighter recoil. Any single, double, and most pump shotguns can use this ammo without any modifications. Unfortunately, this ammo will not work in semi-autos. Comes packed 20rds per box.