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 purchase INCLUDES Fan with wire and connector, shroud and two zip ties REQUIREMENTS Attaching to motor can and plugging into receiver SPECIFICATIONS Length: 49mm Width: 44.5mm Height: 44.5mm Wire Length: (9.5"