Conical LABSOLUTE® gaskets made of grey natural rubber are the best sealing between a filter flask and a Buchner funnel. The gaskets are available in eight different sizes with a bottom diameter between 12 mm and 66 mm or in a useful assortment.

The assortment consists of one gasket each with the following lower diameters: 12, 17, 21, 27.5, 33, 48, 58 and 66 mm.