Vacuum Filter Seal

Photo of Vac-Ring™ Filter Seal

The Vac-Ring™ seal fits Büchner funnel stems and seals off the filter flask mouth to prevent air leaks during vacuum filtration. The tapered bore fits funnel stems up to 22mm (7/8") diameter. Made of black neoprene synthetic rubber, the 7mm (3") O.D. ring also supports standard funnels on beakers.