Featuring a unique, highly swept nested fin design, Estes Checkmate two-stage rocket can easily reach 274 meters 900 feet! Single stage or 2-stage, this rocket soars! An Advanced build makes it a great choice for someone just getting started with boosted rockets, who is already accustomed to common rocket building tasks. The Checkmate 7276 Model Rocket launches on 13 mm mini engines (sold separately) and recovery is streamer for the rocket and tumble for the booster. Prepare for re-launch with a new Estes engine, wadding, a starter and starter plug. SKILL LEVEL: Advanced PROJECTED ALTITUDE: 900 ft. (274 m) ASSEMBLY TIME: 3 Hours (finishing & drying time not included) RECOVERY SYSTEM: 18 in. (45.7 cm) Streamer ENGINES : 13mm Mini Rocket Only: A3-4T (001507) A10-3T (001511) Two Stages: Rocket : 1/2A3-4T (001504) A3-4T (001507) A10-3T (001511) Booster : A10-0T (001510)