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Schandalig Panda bon Sciencemadness Discussion Board - Those rubber ring things for hirsh/buchner funnels - How to improvise one - Powered by XMB 1.9.11
Soms soms andere zelf 7 Piece Filter Adapter Tapered Cones Set - Designed for Use with Buchner Funnels - Multiple Sizes - Neoprene Rubber - Eisco Labs: Amazon.com: Industrial & Scientific