The SplatRBall Pyro Glow-in-the-Dark Water Ball Gel Ammo comes with a resealable bag of 10,000 rounds. This water bead ball ammunition is certified and compatible with the SplatRBall Pyro Magazine or Splat-R-Ball blasters with Integrated Pyro Technology. SplatRBall water ball ammo hydrates in 4 hours and fragment on impact. Please make sure you only use this SplatRBall Certified Ammunition. Other brands or types of ammo might damage your SplatRBall blaster.