25 X .68 Cal. Metal PVC Balls 10 Grams Self Defense Less Lethal Paintballs 25 X Ultimate self-protection Less lethal rounds .68 cal The new.68 Cal Metal bearing with PVC coating is the latest non-lethal training munitions available today Best Self Defense Paintball Ammo Alternative New and improved Metal balls 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 long lasting