The Hiross 024S is an S-class (ultra-high efficiency oil removal) filter element in the Hiross brand's compressed air precision filter series. It has a nominal diameter of approximately 1.5 inches (DN40), a filtration accuracy of 0.01 μm, and a residual oil content of ≤0.001 ppm. It is used for oil and water removal at the end of the air compressor's after-treatment system.