Model No: KDE1204PKV2. Power Connector: 2pin. size:40 40 20mm. 25 25 MM 35 35 MM 40 40 MM 50 50 MM 60 60 MM 70 70 MM 80 80 MM 90 90 MM. 3V 5V 7V 12V 24V 48V 110V 220V. 120 120 MM 135 135MM 140 140MM. Specification:1pc fan only.
It perform well for the price.
I replaced server fans with those and its way quieter.
Don't expect complete silence with them .
I'm consistent with wire length and power, 1 out of 4 was 0.8W the others was 0.6W. I don't mind but sounds level was also different