We have a special running - purchase 4 motors, get a free set of 4 Gemfam Carbon Fiber Props
Tiger Motor's Navigator series are one of the best motors available. These high power 510 watt motors are extremely well balanced and runs quiet and cool.
The diameter of this motor is 37.7 mm and has a 4mm motor shaft and a 6mm bolt on prop adapter.
This is our "go to" motor for 650-800mm craft.