No other water rocket you can buy has a unique molded nozzle like this. The nozzle restricts the exit flow of the water and compressed air from the PET bottle creating a longer and higher level of thrust - just like a real liquid rocket engine! This nozzle combined with the Q7308 proprietary launch pad creates one of the most unique and high-performance water rocket launch systems ever! Nozzle is molded from a tough translucent material and will last for hundreds and hundreds of safe, fun launches!