Buchner funnels are an import component of vacuum filtration procedures. We carry both porcelain and polypropylene buchner funnels. Our polypropylene buchner funnels are made of two pieces which allows for easy cleaning. Our porcelain buchner funnels include a fixed perforated plate and glazed on the inner and outer surfaces. https://www.southernlabware.com/vacuum-filtration/buchner-funnels.html