The Steambow AR-Series B08 .68 Caliber Nylon Balls are lightweight training and practice projectiles designed for the B08 Crossbow and magazines as well as compatible .68 caliber shooting guns. Each white nylon ball measures 17.27mm in diameter and weighs 3g, providing a flat trajectory at the intended power level. Steambow specifies these projectiles for bows with a maximum draw weight of 55 lbs. and cautions that they are too hard for paintball or tactical training scenarios involving people.