This car is fast and furious fun that requires no batteries or specific weather conditions to limit its usage. A pump-up bar with a pressure meter is built into the car for easy operation. The air chamber is made from PET (polyethylene terephthalate), the silicon tube creates an air tight fit. A safety valve has been implemented into the kit as another safety device. When the compressed air is released it drives the vehicle a distance up to 50 meters in 35 seconds. OWI's Air Power Racer is not only designed with the environment in mind, but is also fun and easy to build! For ages 10 and up.