Glass fiber filter, round, GF/D, 25 mm, 100 pc/PAK

Whatman Glass Fiber Filter Grade GF/D is equivalent to Schleicher & Schuell GF53 and Munktell MGD
Features: Faster flow rates than cellulose filter paper with similar particle retention.
The filter is thick and consequently has a high loading capacity. Designed as a membrane prefilter and available in sizes to fit most filter holders.
The GF/D filter offers good protection for fine pore membranes. Can be used in combination with grade GF/B as a very effective, graded pre-filter for membrane protection.
Grade GF/D: 2.7 µm

You can find the certificate here: https://www.cytivalifesciences.com/en/de/support/quality/certificates