Whatman Glass Fiber Filter Grade GF/B is equivalent to Schleicher &Schuell GF51 and Munktell MGB Grade GF/B is three times thicker than GF/A with higher wet strength and significantly increased loading capacity. Grade GF/B combines fine particle retention with good flow rate. Particularly useful when liquid clarification or solids quantification is required for heavily loaded fine particle suspensions. Can be used as a fine retention membrane prefilter. Used in LSC techniques where high loading capacity is required. Grade GF/B: 1.0 µm You may find the certificate here: https://www.cytivalifesciences.com/en/de/support/quality/certificatesMeer tonenMinder tonen