Crosman Copper-Coated 4.5mm BBs provide reliable and consistent performance with almost any 4.5mm-caliber BB air rifle or air pistol. Available in "EZ-Pour" bottles for quick and easy reloading in pack sizes of 1500-count to 6000-count. Ideal for those just entering the BB air rifle/pistol sport, for marksmanship skills development, and backyard BB plinking enthusiasts.