Features:This heat sink is suitable for 540 / 550 motor of 1/10 electric RC model car.Equipped with 5V cooling fan, practical for protecting the motor from overheating.Good heat dissipation performance ensures safe and efficient work.Suitable for HSP / Redcat / AXAIL SCX10 / Traxxas / TRX-4 / D90 / D110 / Tamiya CC01 1/10 scale electric RC car.With high quality materials and exquisite workmanship, it is durable and easy to use.Specification:Condition: 100% Brand NewItem Type: RC AccessoryMaterial: Aluminum Alloy + PlasticOptional Color: Purple, Black, Blue, GoldTotal Size: Approx. 55 * 30 * 30mm / 2.17 * 1.18 * 1.18inchCooling Fan Size: Approx. 30 * 30 * 10mm / 1.18 * 1.18 * 0.39inchWeight: Approx. 26gApplicable Motor: for 540 / 550 MotorApplicable RC Car: for HSP / Redcat / AXAIL SCX10 / Traxxas / TRX-4 / D90 / D110 / Tamiya CC01 1/10 Scale Electric RC CarCooling Fan: DC 5V @ 0.12A 7000RPMPackage list:1 * Motor Heat Sink with Cooling FanNote:Please allow 1-3cm error due to manual measurement and make sure you do not mind before ordering.Please notice that the item color displayed in the pictures may be slightly different from the real object due to different monitors or other factors..