Features: Exquisite Workmanship: With high quality material and exquisite workmanship, this cooling fan is-solid for long term use Prevent Motor From Overheating: The speed can reach-up to 14000RPM, excellent heat dissipation effect to protecting the motor and extend motor's service life Easy to Install: Motor Cooling Fans is in small size and lightweight, convenient for you to install and remove Realistics and Cool: The exquisite appearance and stable performance of RC-electric motor heat sink make your RC-car look more realistics, cool and practical. It is a good choice for RC-fans. Perfrctly fit your orginal part. Notice: 1.Actual color may be slightly different from the image due to different light effect 2.Please allow 1-3cm deviation due to manual measurement               Description: Size: 40*40mm Operating voltage: 4.8-8.4V Speed: 14000RPM Package List: 1x 40x40mm Motor Cooling Fans