The Corsair 120mm + 140mm Black Computer Case Fans are designed for optimal cooling performance in your computer case. With a fan diameter of 120+140mm, these fans operate at a maximum fan speed of 2800 RPM to efficiently dissipate heat. The 3-pin power connection ensures compatibility with most computer systems, while the sleeve bearing type provides reliability and durability. Made of high-quality plastic and manufactured in China, these case fans by Corsair are a reliable choice for improving the temperature management in your computer setup.