RIO slugs are an excellent option for hunting competition and personal defense where devastating stopping power needs to be delivered at short ranges. The extensive research and testing carried out in their factory in the field and by independent 3rd parties have helped to achieve a line of robust slugs in various configurations for a multitude of game sport and defensive roles. Rio slugs are designed for compatibility with most standard shotgun barrels. Product Specifications Gauge: 12 Shell Length: 2.75" Shot Weight: 9 Pellets Bullet Type: Buckshot Muzzle Velocity: 1250 fps Shot Size: 1 Buck Quantity: 25 Rounds per Box