WINSINN 40mm Blower Fan 5V Dual Ball Bearing 4020 40x20mm Turbine Turbo Brushless for Cooling 3D Printer Extruder Hotend High Speed (Pack of 4Pcs)

✔️️Dual ball bearings 4020 Blower Fan - High Speed version ✔️High quality Dual ball bearings, More stable and Long life, suitable for continuous work. Use time can 24 hours / day. The life expectancy is about 60,000 hours. No maintenance required. But Lubricating oil can further reduce noise. ✔️️Rated voltage: DC 5V ✔️️Size: 40x40x20mm ✔️️️Made by WINSINN