Fritsch® flat gasket 57,5x48x2 silicone f. Cup P-7 pl except

made of silicone 57.5 x 48 x 2 mm for all grinding bowls premium line 80 ml, 45 ml, 20 ml volume, except agate. Due to a fixed O-ring in the lid, the premium line grinding bowls close so tightly that grinding in suspension is also possible without any problems without an additional seal. For grinding with solvents or for dry grinding of slightly corrosive samples, we recommend our seals made of Viton (article no. 84.0341.15), as these have a much higher chemical resistance.