This is the Strong-Arm Flying Model Rocket Kit by AeroTech. Adult Supervision Recommended For Those Under 16 Years of Age. FEATURES: 44" long Precision airfoil molded fins Fin-Lok fin mounting system Labyrinth ejection gas cooling system 4-Trapezoidal fins with blunt trailing edge airfoil Decals Instructions included INCLUDES: One model rocket REQUIRES: Assembly Finishing supplies _ Mantis launch pad (AROT8281) Interlock controller (AROT8381) Motors: Reloadable motor system (RMS) E18-4W E28-4T F24-4W F39-6T E16-4W F40-7W F22-5J F52-8T G33-5J G64-7W G33-7J G64-10W Single-use motors (SU) E15-4W E30-4T F25-6W F50-6T G40-7W G80-7T Econojet single-use motors F20-4W G35-7W SPECS: Stages: 1 Length: 44" (1120mm) Diameter: 2.6" (6.7m) Nose cone: 5:1 Ogive Weight (without motor): 18oz. (510g) Motor mount: 29mm (includes 24mm adaptor) Recovery system: parachute tlh 3/1/11