The top choice of students for over 35 years, the Alpha reaches altitudes up to 1,000 ft before it descends by parachute safely back to earth. This skill level 1 rocket requires some assembly and painting (paint not included). Rocket measures 12 L x 1 diam and accepts A8-3 (item 752312B), B6-4 (item 752314B), and C6-5 (item 752316C) engines. The Bulk Pack contains 12 rockets only; it requires engines, a controller, and a launch pad (not included). Rockets are reusable. Simply replace the rocket's engine, starter, and recovery wadding, and your students are ready to rock it again!