Our cap darts are .40 caliber with a plastic body, and will fit in a standard stun dart quiver. Their tips are specially designed to hold a cap, which contains a small amount of gunpowder. When it impacts a target, the gunpowder explodes with a loud crack. In the hands of a stealthy warrior, these will provide a very effective distraction at a safe distance. This set includes 25 darts and 144 caps.