This is the Team Integy Motor Heatsink with Twin Cooling Fans (Silver). For use on the Traxxas 1/10 Slash 4x4.
Motor heatsink assembly with attached fan and BEC connector
Fastening to 1/10 Slash 4x4 motor
Length: 2.4" (61mm)
Width: 1.57" (40mm)
Height: 1.65" (42mm)