Recommended Engines1/4A3-3T, 1/2A3-2T, 1/2A3-4T, A3-4T, A10-3TProjected Max Altitude850 ft. (259 m)Recovery SystemFeatherweightLength4.5 in. (11.4 cm)Diameter.54 in. (14 mm)Estimated Weight.09 oz. (25.5 g)Estimated Assembly Time1 Hour (painting and glue drying time not included)Fin MaterialsLaser cut woodDecal TypeWaterslideLaunch SystemPorta-Pad II and Electron Beam Launch ControllerLaunch Rod Size1/8"Age RecommendationEstes model rocketry is recommended for boys and girls ages 10+ with adult supervision for those under 12, and rocketeers of all ages.