Pyramid (square) pleated filter paper is easy to use and saves valuable time during repeated or multiple analyses. Fits easily into conical funnels Saves valuable time during repeated or multiple analyses Offers the same high quality and consistency Thickness 180 µm, weight 87g/m² Nominal ash content 0.06% The certificate can be found here if required: https://www.cytivalifesciences.com/en/de/support/quality/certificatesMeer tonenMinder tonen