Manufacturer:Bel-Art Products Family
Part #:BEL TSI-H389590000-1
The Vac-Ring™ seal fits B√ºchner 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.