DescriptionThe item is a professional and practical heatsink, which is mainly made of durable aluminum alloy. Fit for most kind of motor car and modified motors use. Also great for electric powered boats. for RC Cars. Equipped with an practical heatsink fan, make it have more better heatsink performance.Features- Color: Blue. - Material: Aluminum alloy - Size: 10 x 9 x 6.8cm - Adaptation motor size: 3.5-3.7CM - Fan input voltage: 4.8-6V - Made of full aluminum source material, durable and practical. - Equipped with heat fan, make it have more better heat performance. - Suitable for most kind of stock and modified motors. Caution: Please confirm it is fit with your motor before purchase. - Also great for electric powered boats. - Warm Tip: Dear buyer, Due to lighting effect,monitor's brightness,manual measurement and etc, there could be some slight differences in the color and size between the photo and the actual item. sincerely hope that you can understand! Thank you.