25 X Ultimate self-protection Less lethal rounds .68 cal Heaviest ball on the market, 10 Grams each ball Designed for maxim impact. Please use riot balls responsibly The new.68 Cal Metal bearing with PVC coating is the latest non-lethal training munitions available today. The .68 Cal Ultimate Balls are extremely effective, Best Self Defense Paintball Ammo Alternative New and improved Metal balls are 10 grams, about 17mm or.68 These work great and are intended for practice target shooting and possible home defense against intruders or animal attacks. They work in all .68 cal. paintball guns, They are reusable, do not deform, and are long-lasting. The color is white or gray, depending on our stock