This is the Sumo High Power Flying Model Rocket Kit by AeroTech. Adult Supervision Recommended For Those Under 18 Years of Age. FEATURES: Rugged construction Roaring 2500 foot high flights Precision airfoil molded fins Fin-Lok fin mounting system Labyrinth II "no wadding needed" ejection system Piston ejection Decals Instructions included INCLUDES: One model rocket REQUIRES: Assembly Finishing supplies _ Mantis launch pad (AROT8281) Interlock controller (AROT8381) Motors : Single-use motors (SU) G40-4W G80-4T G35-4W G38-4FJ Reloadable motor system (RMS) G64-4W H180W-M H180W-M H97J-S H238T-S H165R-S H210R-M SPECS: Skill level: 3 Stages: 1 Skill level: 3 Length: 39" (990mm) Diameter: 4" (101mm) Nose cone: new 9oz, grey, 4:1 Ogive Weight (without motor): 32oz. (907g) Motor mount: 29mm Recovery system: 42" parachute tlh 3/2/11