Properties: Medium-fast filtering Filtration speed of 60 s/100 ml A fast to medium-fast filter cardboard that is characterized by high wet strength and medium particle retention. These filter papers are made from super-refined cellulose and have been specifically designed to have particular properties for each technical application. The applications range from the filtration of beverages to the purification of electroplating baths. Grade 2589 a: 6-12 µm Here you can find the certificate: https://www.cytivalifesciences.com/en/de/support/quality/certificatesMeer tonenMinder tonen