Used in applications where filter paper would be attacked by the material being filtered, these borosilicate glass Buchner filter funnels with sealed-in fritted glass discs are available in various capacities* with Coarse(C), Medium(M), or Fine(F) porosities. *Larger sizes available upon request. Scientists rely on the expertise and artistic skills of Wilmad-LabGlass' engineers and glass specialists to manufacture NMR and EPR consumables and laboratory glassware of the highest quality. Used daily in academia, healthcare and chemical, petroleum and other industrial applications, Wilmad offers 7000+ items as part of their standard catalog as well as custom fabrication for individual glassware, glass repair services and OEM glass parts.