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Pro75® rocket motor hardware is CNC machined from 6061-T6 aluminum alloy and anodized for corrosion protection. 5 components make up a complete Pro75 motor hardware set - the motor casing, the forward closure, the nozzle holder (rear closure), and the threaded retaining rings (2) for each end of the case. An accessory wrench is available which make fitting and removing the retaining rings a snap.
Motor cases and closure components are available separately or in economical sets. The forward closure, nozzle holder and retaining rings can be interchanged between the five motor casing sizes.
Pro75® motor casings are available in five sizes to fit reloads from K through M class - please refer to the motor specification page to see which casing is required for each reload.