The Versatile Water Rocket / Pop Bottle RocketLauncher combines all of the characteristics of AntiGravity's four individual launchers into one. And it comes with four different size nozzles so you can tailor the thrust to the exact requirements of your rocket.  Each of the four different nozzle connections uses our expanding-bulb principle to hang onto the inside of the rocket nozzle while you are pumping up the rocket, and then to release the rocket when you stop pumping.

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