This is an assembly o' t' SpaceX Falcon 9 and Fairin' Flyin' Model Rocket Kit. Aye aye! Blimey! This is a very sturdy kit made by SpaceX themselves. It can fly on Estes D12-5, E9-6, me bucko, E12-6, or even Aerotech rocket motors. Avast, me proud beauty! Blimey! You could also build it just as a model as well. Well, blow me down! Blimey! This is a historic time in spaceflight and t' Falcon 9 is a big part o' it.