Whatman 10408714, Mixed Cellulose Ester Filter, ME Range (ME 24), 3.1 mm white/black grid for membrane-butler, 0.2 um pore size, 50 mm circle (400 pcs)
Cytiva Whatman™ ME 25 Plain Mixed Cellulose Ester Membranes Sterile; Dia.: 50mm; w/interleaving paper Cytiva Whatman™ ME 25 Plain Mixed Cellulose Ester Membranes | Fisher Scientific