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This is for an Honest John rocket for BT-60 scale body tube size.It is Part 1 of a two (2) piece cone set. This design will help for payload as well s nose weight, depending on motor selection. You must by Part 2 for the complete set, seperately. This is Part 1 only. See my Fin Unit to go along with this Nose cone set. Its super detailed at this wonderful scale with guiderails ans spin rocket nozzles!