Details:

• 100% brand new and high quality.

• Diameter : 36mm

• This heat sink fits for 540,550 and 3650 size motor（(Motors with an outer diameter of 36mm can be used!)）, it will come with a 5V cooling fan, to protect your motor.

• The cooling fan can power up from the receiver, using conveniently and easily.

Package Includes:

• 1pcs x Aluminum Heat sink with 5V Cooling Fan