This is the Astrobee-D Flying Model Rocket Kit by AeroTech. Adult Supervision Recommended For Those Under 16 Years of Age. FEATURES: Fantastic detailing Almost one-half the size of the actual sounding rocket Blueprint included Precision airfoil molded fins Fin-Lok fin mounting system Labyrinth ejection gas cooling system 4-tapered swept fins with compound airfoil Self-adhesive graphics Nylon parachute Instructions included INCLUDES: One model rocket REQUIRES: Assembly Finishing supplies _ Mantis launch pad (AROT8281) Interlock controller (AROT8381) Motors: Reloadable motor system (RMS) F-40-4W F52-5T G64-4W Single use motors (SU) F50-4T G40-4W G80-4T Econojet single use motors G35-4W SPECS: Stages: 1 Length: 69" (1750mm) Diameter: 2.6" (67mm) Nose cone: 5:1 Ogive Weight (without motor): 28oz. (790g) Motor mount: 29mm Recovery system: parachute tlh 3/1/11