Specification 

AS1668/2 Mod

Diameter: 68mm 
Pitch: 110mm(4.33") 
Aspect Ratio: 1.6 

After Mod: 
Diameter: 66mm 
Pitch: 115mm (4.53") 
Aspect Ratio: 1.7 
Center Bore Accepts 1/4" Propshaft 
Material: Beryllium copper combines with yellow copper

This prop has been sharpened, balanced, and polished, diameter reduced, back-cuts notched into trailing edges to increase rpm, tongue removed from leading edges and The blades have been thinned and the leading edge re-shaped. 
This is a great prop for stock or mod engines and helps hulls plane more easily; it is well suited for all type hull, especially a great prop for Mono Hull.