This is the HV Arcas Flying Model Rocket Kit by AeroTech. Adult Supervision Recommended For Those Under 16 Years of Age. FEATURES: Fantastic detailing Precision airfoil molded fins Fin-Lok fin mounting system Labyrinth ejection gas cooling system 4-clipped delta fins with double-wedge airfoil Decals Instructions included INCLUDES: One model rocket REQUIRES: Assembly Finishing supplies _ Mantis launch pad (AROT8281) Interlock controller (AROT8381) Motors: Reloadable motor system (RMS) E28-4T F24-4W F39-6T F40-4W F52-5T G33-5J G64-7W Single use motors (SU) E30-4T F20-4W F25-6W F50-6T G35-7W G40-7W G80-7T SPECS: Stages: 1 Length: 56" (1420mm) Diameter: 2.6" (67mm) Nose cone: 5:1 Ogive Weight (without motor): 14oz. (400g) Motor mount: 29mm Recovery system: parachute tlh 3/1/11