As a primary filter, particles whose diameter more than 5μm can be remove,the maxi. residual oil content is negligible | High efficiency general protection, dust particles, water mist & oil mist whose diameter more than 1μm can be removed, the residual content of oil mist does not exceed 0.6mg/m³ (21ºC),1ppm(w). | High effiency oil remove filtration, dust particles, water mist and oil mist whose diameter more than 0.01μm can be removed, the residual content of oil mist does not exceed 0.01mg/m³(21ºC),0.01ppm(w) | Ultra-efficient filtration, dust particles, water mist&oil mist whose diameter more than 0.01μm can be removed, the residual content of oil mist does not exceed 0.001mg/m³(21ºC),0.001ppm(w) | Dust particles whose diameter more than 0.01μm, oil vapor &odor can be removed, the maxi. resident content of oil vapor does not exceed 0.003mg/m³(21ºC),0.003ppm(w) | Dust particles whose diameter more than 1μm can be removed | Dust particles whose diameter more than 0.01μm can be removed |