Geospace 6-Inch SLAP ROCKET Replacement Rockets Six-Pack in Assorted Colors These 6-inch long rockets will fit your Slap Rocket. Set includes 6 Slap Rocket Replacements in assorted colors. More Rockets = More FUN! Like all Geospace Pump Rocket items, the patented Thrust Booster enhances flight distance. For use with Slap Rocket launcher, rockets can fly up to 50 feet!