Cellulose Nitrate Filter Membranes, Gridded, Sterile, Whatman #7141-104:

Product Code #7141-104

For microbiological laboratory use. Features clearly defined grid lines spaced at 3.1mm intervals. Flexible membranes are made to tolerate abuse during handling and loading without sacrificing integrity. Supplied sterile in individual packs, with absorbent pad in polyester envelope.
Low level of extractables.
47 mm Diameter, 0.45 µm Pore Size. Package of 100 Membranes.