Hobbywing item HW-86080150 - FAN-3010BH-5V-10000RPM@5V-BLACK-A 86080150 Cooling Fans Motor / ESC / Cooling Fan
With this particular fan installed all on your own ESC heatsink, then you definitely'll undoubtedly have many cooling performance.
Specifications: Ball Bearing / Non-waterproof / JR-3P Male Plug / L=200MM
Applications: regular applicaion. well suited for motor air-con