The be quiet! Dark Rock Pro 4 CPU Fan with Heatsink in black features a 135mm and 120mm fan diameter with a maximum fan speed of 1500 RPM. It is designed for high cooling performance with a 250W TDP and uses a fluid bearing for smooth operation. The aluminum material ensures durability and efficient heat dissipation, while the 4-pin power connection provides easy installation on the CPU. Ideal for those looking for a reliable cooling solution to keep their computer running smoothly.