Upgrade your 3D printer with these high-quality 40mm fans from WINSINN. These micro fans are designed to provide optimal cooling for your printer, ensuring that it runs smoothly and produces high-quality prints. The pack includes five 5V 4010 fans, which are easy to install and compatible with a wide range of printers.These fans are manufactured to the highest standards, so you can be confident that they will provide reliable performance for years to come. Whether you're a hobbyist or a professional, these fans are an essential addition to your 3D printing toolkit. So why wait? Add them to your cart today and take the first step towards better printing results.