Hobbywing item HW-86080110 - FAN-5010SH-5V-5300RPM@5V-BLACK-B 86080110 Cooling Fans Motor / ESC / Cooling Fan
Using this type of fan attached along with your ESC heatsink, you will have the utmost cooling performance.
Specifications: Oil/Porous Bearing / Non-waterproof / JR-3P Male Plug / L=200MM
Applications: regular applicaion. worth motor air-con