ELUTENG Dual 40mm USB Fan with 3 Speeds Adjustable 5V PC Fan Max 5500RPM 40mm * 40mm * 25mm Mini Case Fan Quiet Computer Fan Compatible for PC, TV Box, Router, Xbox, Playstation
For Delta Ffb1224she 12038 24 V 1.20 5500 Rpm Big Air Volume Converter Cooling Fan For 120*120*38mm - Fans & Cooling - AliExpress
Delta Electronics PFC1212DE-F00 5500 RPM Cooling Server Fan 447594-001