these props have been cut down to 57 MM there tounges have bee reduced ,,they are very thin and sharp, props, the 600 series octuras are excellent fast props, with the right set up these props will put you over 100 MPH 57 MM X 4.096" of pitch 3/16 shafts $140 shipped USA thank you Chris
Set of X665 cut to 57 MM
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