AVC 40mm x 40 MM x 28 mm Kugellager 12V DC Lüfter DB04028B12U-177 3-Draht | eBay
2pcs New FFB0412VHN 4028 4cm 40mm 12V 0.24A PWM DC cooling fan speed control 40*40*28mm|fan speed controller|cooling fan speed controllercooling fan speed - AliExpress
10 Teile LOT Gdstime DC 12V 2Pin 4cm 40mm 40x15mm 4015S Axial Flow Motorkühler Lüfter – Qihaobuy
R124010SL EVERFLOW 4cm 4010 40x40x10mm 40mm lüfter 12V 0,10 A 3 linie geschwindigkeit erkennung stumm CPU lüfter|Fans & Cooling| - AliExpress
Xinyujie 40mm 4010 12 V Dc Axiale Lüfter Mit Temperaturregelung - Buy 40mm 12 V Dc Fan,40mm Dc Fan Axial,40mm Lüfter Mit Temperatur Kontrolle Product on Alibaba.com
BlackSilent Fan XM-1 - 40mm
Power Logic 1U Server Chassis 4-Pin PWM Fan Gehäuse-Lüfter 40mm x 20mm 0.18A 12V