Gear Box
The Master Airscrew Gearbox can dramatically improve performance with longer flight times and better climb.
Features include a lightweight, compact design, and high quality gears and bearings. The output gear shaft is made of 3/16" steel and is unconditionally warranted. Fits motor shafts of .124" diameter (slightly under 1/8") and will accept most standard can motors (reamed pinion gears are available for Astro motors). The prop shaft is 1/4" for fit with the Master Airscrew folding prop and Electric Wood Series.

For more information and option to buy link to:
www.sigmfg.com