HobbyFans Aluminum Motor Cooling Heatsink/Fan Combo (40mm Fan / 28000 RPM / 5-8.5V) S3 Dimensions (L×W×H): With antennas folded:

Dimensions (L×W×H): With antennas folded: 170×109×112 mm / With antennas unfolded: 205×109×112 mm

Black anodized metal

Rear Shocks:

Made with CNC processed aviation-grade aluminum

Installation is a breeze using the included power tap

HobbyFans Aluminum Motor Cooling Heatsink/Fan Combo (40mm Fan / 28000 RPM / 5-8.5V) S3 Dimensions (L×W×H): With antennas folded:This aluminum motor cooling heatsink fan combo is designed for 40xx to 42xx size motors. It is small and lightweight with 28000 RPMs and includes the heat sink. FEATURES: Easy to install and remove. Prevent the motor from overheating even at speeds up to 28000 RPM. Excellent heat dissipation effect to protect the motor and extend its service life. Designed for RC Cars 40xx to 42xx brushless motors. The cooling fan can power up from the receiver.