Model: FK120. Make: DeepCool. Bearing Type: Fluid Dynamic Bearing. 500-1850 RPM Dynamic PWM Range. Fan Speed: 500~1850 RPM±10%. Fan Noise: ≤28 dB(A). High-quality polybutylene terephthalate (PBT) material is used to ensure increased durability and wear resistance, allowing the fan blades to maintain high tensile strength.