A bottled set of water marbles sized at 7 to 8 millimeters, this package contains 50,000 rounds of polymer gel balls for use with compatible gel ball blasters. Each wholesale box holds 54 bottles, making it a practical refill option for young players aged 6 to 12 who enjoy outdoor target play. The marbles expand in water and are designed for blaster-style toys. This product is sold wholesale by the box.