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50mm Prop- 4mm Thread
Very rigid black fiberglass-filled high pitch nylon props made only for racing boats. There are two types: props to fit the 4mm Graupner shafts and props to fit 3/16" "Drive Dog" shafts (as used by Octura and others). Use GR2321 Drive Dog to adapt these to Graupner 4mm shafts.,
M4 props
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Found 11 years, 9 months ago