This is a combo package of TiTAN's 21005 40mm fan shroud cover and their 21002 40mm HV Motor Cooling Fan. TiTAN's fan shroud concentrates air volume and increases cooling efficiency over the motor.

Team TiTAN's 40mm high voltage (HV) cooling fan is suitable for connection to the receiver (BEC voltage) and direct connection to the battery tabs on your ESC (HV up to 8.4V).