Quantitative Filter Paper, Diameter 18.5 cm, Material Cellulose, Porosity Slow, Minimum Pore Size 2.5 micron, Maximum Pore Size 2.5 micron, Thickness 0.17 mm, Fluted No, Grade 42, For Use With Gas, Liquids, Overall Length Not Applicable, Overall Width Not Applicable, Standards , Shape Disc, Package Quantity 100