Qualitative Filter Paper, Diameter 9 cm, Material Cellulose, Porosity Slow, Minimum Pore Size 2 micron, Maximum Pore Size 2.7 micron, Thickness 0.177 mm, Fluted No, Grade 50, For Use With Liquids or Air, Overall Length Not Applicable, Overall Width Not Applicable, Standards , Shape Disc, Package Quantity 100