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E-Prop Composite Propellers for Vittorazi Moster & Atom engines - 125cm.
If you are not sure of your Moster reduction type, then look at the top pully.
128mm Pully = 2.68 (Standard Moster)
130mm Pully = 2.87 (Moster Factory R and most PAPs)
Atom = No reduction option.
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