Bel-Art Cellulose Filter Paper Discs; for 10.25 in. I.D. Funnels (Pack of 100) (H14632-0010) Filter paper discs are custom-sized to fit the scienceware(R) 10.25" table-top buchner funnels Heavy-bond grade as indicated by the grammage value of 100g/square meter and have a thickness of 0.30mm Made from creped white cellulose to improve porosity, they have a flow rate of 90ml per minute Wet burst strength is greater than 68 KPa and they are able to retain particles as small as 3 microns