this heatsink is suitable for 540/550/3650 size motor, with a 4.8-6V cooling fan to protect your motor.
The cooling fan can power up from the receiver, very easy to use.
Dimensions of fan: Approx.1.18x1.18x0.39 inch/ 30x30x10mm
Dimensions of cooling fin: Approx. 1.18x1.57 inch/ 30 x 40mm
Total Height: 1.97 inch / 50mm
Color: Blue
Materials: metal
Weight: 25g
Package Contents: 1 X Aluminum Heat sink w/ 5V Cooling Fan
Only the above package content, other products are not included.
Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.