This is the Motor Cooling Blower Fan and Shroud from Castle Creations.
FEATURES: Fits motors with outside diameter between 1-1/2 and 1-7/8"
(38 - 47mm) such as the Castle Creations Neu-Castle 2200 and 2650
Plugs into receiver and drops motor temperature as much as 30°
One year limited warranty through manufacturer beginning at date of
INCLUDES: Fan with wire and connector, shroud and two zip ties
REQUIRES: Attaching to motor can and plugging into receiver
SPECS: Length: 49mm
Wire Length: (9.5")