Specification: Item Type: ;Dual Fan Motor Heatsink Material: Aluminum Alloy + Plastic Weight: Approx. 134g / 4.7oz Voltage: 8.4V Maximum Speed: 16000RPM Fan Size: Approx. 40x40mm / 1.6x1.6in Radiator ;Size: Approx. ;80x64.2x57.2mm / 3.1x2.5x2.3in Application: Suitable for Brushless Motors with a Diameter of 55mm/2.17in, 56mm/2.2in, 58mm/2.28in (such as: 5682/5692/56112 Brushless Motor), Suitable for 1/5 Remote Control Car Package List:1 x ;Dual Fan Motor Heatsink Note:1. Since it is manual measurement, please allow an error of 1‑3mm, thank you! 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item.3. The motor is not included in the delivery.