This is the G-Force Flying Model Rocket Kit by AeroTech. Adult Supervision Recommended For Those Under 16 Years of Age. FEATURES: Rugged construction Roaring 750 foot high flights Precision airfoil molded fins Fin-Lok fin mounting system Labyrinth ejection gas cooling system Decals Instructions included INCLUDES: One model rocket REQUIRES: Assembly Finishing supplies _ Mantis launch pad (AROT8281) Interlock controller (AROT8381) Motors : Reloadable motor system (RMS) G64-4W G71-4R G76-4G Single-use motors (SU) G38-4FJ G40-4W G77-4R G78-4G G79-4W G80-7T 137 N-sec version G80-7T 137 N-sec version SPECS: Stages: 1 Skill level: 3 Length: 60" (1520mm) Diameter: 4" (101mm) Nose cone: 4:1 Ogive Weight (without motor): 32oz. (907g) Motor mount: 29mm (includes 24mm adaptor) Recovery system: 42" parachute tlh 3/2/11