The rocket body is a solid chunk of resin with finely cast and crisply molded details with no visible airholes. The engine nozzle is nicely hollowed out while the turbine exhaust is solid. All parts need to be removed from their pour plugs/wafers. Six photoetched parts are provided for the antennae but only four are needed, so you have a couple of extras in case you lose one of the those tiny rascals. The instruction sheet includes a short program history, a multiview assembly drawing and painting/decal placement guides to depict either the AM-18 Bioflight 2 vehicle, a Redstone Arsenal test vehicle, or an operational IRBM.