Green Tapered Collar Filter Adapter Cones Rubber Stopper Buchner Funnel Flask Filtration Set for Filtration, Good Seal

With a tapered design, the top and bottom diameters are different, and there are nine different sizes to suit your needs. They are used for filter funnels or Buchner funnel, which can be used singly or nested with adjacent sizes. They are used for filtration assemblies,together with a buchner funnel and a buchner flask for filtration. Through these rubber stoppers can reduce the risks associated with insertion and removal of glass stems,provides security for the process used. The tapered filter adapter cones set is made of high quality rubber with good elasticity, smooth surface, abrasion resistance and durability.