This set contains all the components to build three rocket bodies and three C-class rocket engines. It also includes a tooling kit (used to build the engines), a launch pad and fuse. The finished rocket is about 300mm tall and includes a parachute release system. Altitudes of over 200m can be reached. It is preferable to launch from a large open field such as a sport field. To launch more rockets, you can purchase the Cobra Rocket Body Refill Kit and Cobra Rocket Engine Refill Kit. For electric ignition (vs. fuse) you can purchase the optional Electric Launch Controller Kit and Electric Igniters. The Cobra Rockets are fun and safe, but can only be sold to persons of 16 years and older.