MPC Looney Tunes Marvin The Martian's X-2 Invader Rocket Kit Adult Supervision Required Compatible Engines: Estes or Quest A8-3, B6-4, C6-5 Recovery Method: 18" plastic parachute Includes pre-decorated paper body tube and self-stick fin decals Engines, engine igniters, recovery wadding, launch pad and launch control unit sold separately