This motor heat sink with two cooling fans is made from high quality aluminium and plastic， which is designed for 1/10 RC racing car with 36mm diameter motor. It is practical and durable for protecting the motor from overheating.Features:Made from high quality aluminium and plasticFor 1/10 RC racing car， 36mm diameter motorTwo cooling fans protect the motor from overheating efficientlyEasy to installSpecifications:Operating voltage: DC 5V 0.15AMaterial: aluminiumSuit for 1/10 HSP RC Car 540/550 3650 MotorColor: blue， red， grey， golden and silver optionalInside diameter: 34mmWeight: 50gPackage Information:Package Size: 6.2 * 4.6 * 4.2cm / 2.5 * 1.8 * 1.7inPackage Weight: 51g / 1.8ozAdhesive tape packagePackage List:1 * Motor Heat Sink With Two Cooling Fans