These Crosman Copperhead BBs feature copper coated stainless steel ammunition for unmatched reliability and accuracy. This case contains 12 bottles and each bottle contains 1,500 BB's for a long lasting supply of ammo! Each BB is 5.23 grain, .177 caliber. Precision manufacturing processes provides you with smooth, accurate firing every time. These are great for target practice, competition, or teaching youngsters proper firearms handling skills. Use Crosman Copperhead BBs when you feel the need to strike!