Solid polymer construction is extremely resistant to chipping or shattering Excellent choice for ensuring your BBs hit their mark Resealable package allows easy storage of BBs Seamless, spherical competition grade BBs free of imperfections 5.94mm - 5.96mm diameter BBs designed for all FPS ranges BBs emit a glow-in-the-dark luminescence when exposed to bright lightSpecifications: Brand BLS Perfect BB Build Polymer Compatibility 6mm Barrels Color Green 1X 1Kg Bag of Tracer BBs