WINSINN 40mm Fan 12V Brushless 4020 40x20mm for Cooling 3D Printer Extruder

Oil bearings 4020 Fan - High Speed version
Oil bearings, use time no more than 16 hours / day. The life expectancy is about 30,000 hours. Lubricating oil is required to maintain the bearing.
Rated voltage: DC 24V
Size: 40x40x20mm
Made by WINSINN