Arrma ARAC7009 Motor Heatsink 4x4 BLX 3S, AR310883** Replacement Part but logically it was during WWII but logically it was during the second global war when it was a fundamental part of the german air fleet Unique multi temperature controlled adhesive shrinkage system FeaturesPrecisely manufactured for an excellent 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 the mounting of aftermarket fans for additional cooling Specifically designed for the ARRMA 4X4Includes1 x Motor Heatsink This is the Arrma ARAC7009 Motor Heatsink 4x4 BLX 3S