These Flexi Props are of a modern design and are ideal for  both electric motors and IC engines

Initially made for our bouncy trainer we had them made in bright orange so they are highly visible

The 11 x 6  or 12 x 6  Flexi prop is Ideal for the 35-14 out runner used with our Mini panic 

Or ideal with 40 to 53 glow motors used on our moronics