Noctua A-Series NF-A9x14 92mm Blades with AAO Frame, SSO2 Bearing Premium PWM Low-profile Fan - Newegg.com
Creality Noctua Nf-a4x10 Pwm 40mm X 10mm Ultra Quiet Silent Fan 12v 3-pin Premium Cooling Fan For Cr-10/cr-10 S5 Mini 3d Printer - 3d Printer Parts & Accessories - AliExpress
NO NFA12X25PWMSW: Noctua NF-A12x25 PWM chromax.black.swap case fan, 120 mm at reichelt elektronik