These premium .177 steel BBs manufactured by Hornady have a black annodized finish and they are 100% inspected. The finish provides reduced surface variation for maximizing speed, accuracy, and distance traveled. Licensed Trademark of HornadySpecifications and Features: Compatibility: All .177 Caliber Airguns Quantity: 1,500 Size: .177 Caliber (4.5mm) Anodized Finish Provides Less Friction Easy-Pour Bottle Precision Quality Steel BBs Seamless Design Improved Velocity, Range, & Accuracy