The Antec Kuhler 600 Pro series features a High-Performance Pump with LED Status Indicator. The integrated Status LED lights up during operation. The 7-Blade PWM 120mm Rifle bearing fan is whisper quiet and provides exceptional cooling for the radiator. The High Performance 120mm radiator features a complex structure of 0.28mm thick heat fins with 1.3mm empty space in between each of them to maximize the heat dissipation. High-Quality FEP tubes with minimal moisture absorption and kinetic tolerance for a prolonged lifespan.