be quiet! BL138 Pure Wings 3 140mm PWM High-speed 3-Pack Case Fans

Three 140mm PWM fans in one pack

This three-pack supplies three be quiet! Pure Wings 3 140mm PWM case fans for builds that need balanced intake and exhaust. Each fan uses a 4-pin PWM connector for automatic speed control through the motherboard. The rifle bearing is designed for quiet, long-lasting operation.

Suited for radiators and restricted airflow

The closed-loop motor monitors actual rpm and compensates when resistance from a radiator or dense mesh slows the blades, keeping speed at the target value. A redesigned frame outlet reduces air leaks, and the nine optimised blades raise static pressure to 2.44mm/H2O. Builders who only need a single rear exhaust fan or who prefer a different bearing type should look at other options.

2.44mm/H2O static pressure

This pressure rating is the key figure for deciding whether the fans can push air through a water-cooling radiator or a restrictive filter. The high-speed PWM range and closed-loop control maintain that pressure across varying loads, making the kit a direct match for liquid-cooled and high-impedance air-cooled systems.