Bel-Art Vac-Ring Neoprene Filter Seal; For Funnel Stems up to ⁹/₁₀ in. Diameter (H38959-0000)
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<b>[Product Information]</b><br>
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<li>The Vac-RingTM Filter Seal is a black neoprene gasket</li>
<li>Increase filtration flow rate by blocking ambient air flow during vacuum filtration</li>
<li>Fits Buchner funnels on vacuum flasks and regular funnels used over</li>
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