Laboratory Glassware > Funnels > Buchner Funnel Seals > Buchner Funnel Seals Natural
If you have spent years searching for these, the good news is that they are back.
These sealing rings are made from the same high grade natural rubber and provide unrivalled sealing and support for your funnels
Available in 4 sizes to suit almost every flask/funnel combination. To suit neck sizes from: – 35mm, 45mm, 60mm and 68mm