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Merck
Whatman® Anodisc inorganic filter membrane unsupported, diam. 13 mm, pore size 0.02 μm, autoclavable

Whatman® alumina Anodisc filter discs 0.2 μm pore size

Whatman® Anodisc inorganic filter membrane unsupported, diam. 13 mm, pore size 0.02 μm, autoclavable