or
Filter Papers; Whatman; Qualitative; Reeve angel 802; Wet strengthened; Prepleated; Particle retention: 15um; Pore size: 30-35um; 0.26mm thick; 12.5cm dia.
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Filter Papers; Fisherbrand; Qualitative; Grade P4; Cellulose fiber; Particle retention: 4-8um; Porosity: Fine; Filtration Speed: Herzberg, 730 seconds; Flowrate: Slow-25mL/min.; Circles; 12.5cm dia.
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