Features 1、RC radiators with thermal sensors are equipped with 5‑10V cooling fans to protect your motor. 2、The temperature sensor can accurately detect the temperature rise. When the temperature of the motor reaches 40℃, the cooling fan will automatically turn on to cool the motor. 3、The cooling fan can be powered by the receiver, making it convenient and easy to use. 4、The heat sink adopts the shape of clamp designed with high quality material and exquisite workmanship, which is durable and can be used for a long time. 5、Suitable for 36mm motor such as brushed 540550 motor, brushless 3650 3660 motor, etc. Specification Condition: 100% Brand New Item Type: Motor Radiator Material: Aluminum Alloy Size: Approx. 60 x 30 x 15mm / 2.4 x 1.2 x 0.6in Type: RC accessories Quantity: 1 Suitable for Motor: 36mm motor (such as brushes motor 540550, brushless motor 3650 3660, etc.) Fitment Model: Fit for TRX4 Fit for SCX10 Fit for Wltoys Fit for Tamiya series Package List 1 x Motor Radiator