Noctua NF-A4x10 24V PWM, 40mm Quiet Fan for 3D printers and other Applications,
Noctua NF-A4x10 24V PWM, 40mm Quiet Fan for 3D printers and other Applications, 4-Pin, 24V Version (40x10mm, Brown). With SSO2, the rear magnet is placed closer to the axis to provide even better stabilisation, precision and durability.