Check the listing for details. LABEXACT 12K932 16umQuantitativeFilterPaper15.0cm, PK100. Width: 6.600, Condition: New. Listed at 23.59 USD. Quantitative Filter Paper, Diameter 15 cm, Material Cellulose, Porosity Medium, Minimum Pore Size 15 micron, Maximum Pore Size 17 micron, Thickness 0.21 mm, Fluted No, Grade 43, For Use With Gas, Liquids, Overall Length Not Applicable, Overall Width Not Applicable, Standards FDA, Shape Disc, Package Quantity 100 .