This is the Team Integy Super Brushless Motor Heatsink with cooling fan for use on 540 Size Brushless Motors. This heatsink snaps onto the motor can. FEATURES: This silver motor heatsink has a built-in fan Alumimum heatsink construction INCLUDES: Motor heatsink assembly with attached fan and BEC connector BEC pigtail REQUIRES: 540 Size Brushless Motor SPECS: Length: 1.25" (32mm) Width: 1.46" (37mm) Height: 1.38" (35mm) COMMENTS: Also available in Blue (INTC9872) Red (INTC9873) lmm 04.28.10 ir/jxs