Feature:1. With a temperature sensor, the fan automatically starts to dissipate heat when the motor temperature rises to 40℃.2. Made of high-quality metal materials, high thermal conductivity and durability.3. The high-speed fan greatly improves the heat dissipation efficiency of the heat sink.4. Strong compatibility, suitable for HPI/Axial/Traxxas/Wltoys/Himoto and all other 1/10 RC Model Car.5. This accessory is small and lightweight, and will not burden your RC car.Specification:Item Type: RC AccessoriesName: Alloy Aluminum 540/545/550 Size Motor Heat Sink with Fan Cooling Head Ventilation Top JST for HSP/HPI/Wltoys/Himoto/Tamiya 1/10 RC Hobby Model CarMaterial: Aluminum AlloyApplicable Model Ratio: 1/10Color: Blue, Red, Black, Silver (Optional)Working Voltage: 6 VFitment: Fit for HPI/Axial/Traxxas/Wltoys/Himoto and all other brands V-1A, 250mA-350mWVideo System: NTSC / PALAntenna: MMCXSize: Approx. 24 x 27mm / 0.9 x 1.1in (L x W), hole: 20 x 20mm / 0.8 x 0.8inWeight: Approx. 2.7 g.w-e-text table td,.w-e-text table th,;.w-e-text table,Package List:1 x Cooling Fan