This aluminum Motor Heatsink keeps your motor running cool when the action heats up.Features:Precision manufactured for a perfect fit – Black anodized finish with etched ARRMA logo for cool looks – Constructed from high-quality light-weight aluminum – Multi-fin design increases surface area for efficient heat transfer – Flat area allows mounting of 50mm fans - Included heatsink clip - Suited to 46mm diameter motorsIncludes:1 x Motor Heatsink - 4685 Size Motor 1 x Motor Heatsink Clip