Hobbypower Alloy Heatsink w/ 5v Cooling Fan for 1/10 Car 540 3650 Size Motor Purple

this heatsink fit for 540 and 3650 size motor, it will come with a 5V cooling fan, to protect your motor. the cooling fan can power up from the receiver, very easy to use. Package Including: (as picture shows) 1 x Alloy Heatsink w/ 5V Cooling Fan for 540 3650 Size Motor