Helix Propeller 
These three-blade, fixed-pitch props are spec'ed for the Victor 1 Super with 2.84:1 reduction. Left-turning prop, for belt drive in a pusher configuration. Ideal for trikes or other pusher prop aircraft.
Fits other applications that call for a counter-clockwise prop (facing the back of the engine), that use a 6 x 8mm x 75mm flange pattern, with 1" center hole.  Suitable for the Rotax 503 in tractor configuration.
 
Available in 1.5 and 1.6 meter diameter.