The Hiross 120S is an "S-class" filter element in the Italian brand HIROSS's series of precision compressed air filters. Suitable for aftertreatment systems, it has a design flow rate of approximately 12 m³/min and a filtration accuracy typically of 0.01 µm (residual oil mist ≤0.01 ppm). It is used for highly efficient removal of oil, water, and solid particles.