Nitro Hobbies Aluminum 540/550 Motor Heat Sink w/Cooling Fan Silver

This is an Aluminum Snap on 540/550 Motor Heat Sink w/Cooling Fan. It features a durable fan which creates strong airflow to help cool off the motor. It can be mounted on top or side. Feature: For: 540/550 Motor Material: Aluminum Fan comes with Male & Female JST connectors.(plug into standard receiver) Specification: Height: 40mm Width: 38mm Length: 39mm Voltage: 7.2V