Quantitative Filter Paper, Diameter 9 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 FDA, Shape Disc, Package Quantity 100. This item has been restricted from sale in the following state (s): []