This is the Initiator Rocket Kit from Aerotech Consumer Aerospace. FEATURES: A perfect first big rocket Constructed of cardboard with plastic nose cone Precision airfoil molded fins with Fin-Lok fin mounting system Labyrinth ejection gas cooling system Flies to 2000' (610m) INCLUDES: Rocket body, nose cone, parachute, three fins, decals and hardware REQUIRES: Aerotech E through G reloadable or single use motor, see COMMENTS SPECS: Length: 39" (99cm) Diameter: 2.6" (6.7cm) Nose Cone: 5:1 Ogive Weight: 14oz (400g) without motor Fins: 3 swept with cranked leading edges Stages: 1 Motor Mount: 29mm Recovery System: Parachute COMMENTS: Adult supervision recommended for modelers under 16 years of age Aerotech motors compatible with this rocket include; Reloadable E18-4W (AROT5104) E11-3J (AROT5103) E28-4T (AROT5804) F24-4W (AROT6404) F12-3J (AROT6203) F39-6T (AROT6906) E16-4W (AROT5604) E23-5T (AROT5305) F40-7W (AROT4007) F22-5J (AROT6220) F52-8T (AROT6508) G33-7J G64-7W (AROT7407) Single Use E15-4W (AROT5504) E30-4T (AROT5004) F20-4W (AROT6004) F25-6W (AROT6506) F50-6T (AROT6006) G35-7W G40-7W (AROT7007) G80-7T (AROT8007)