Crosman Black Widow 4.5mm BBs provide reliable and consistent performance with almost any 4.5mm-caliber BB air rifle or air pistol. These black-coated steel BBs are available in a 1,000 count "EZ-Pour" bottle that makes refilling a snap. Ideal for those just entering the BB air rifle/pistol sport, for marksmanship skills development, and backyard BB plinking enthusiasts. Features4.5mm black-coated BBs - compatible with 4.5mm-caliber BB air rifles and BB air pistolsEZ-pour bottle - ideal for the BB air gun enthusiast or backyard plinking funMade with quality materials - for consistent and reliable performanceRecommended for use with Crosman BB air rifles and BB air pistols