Filter flasks are used to collect filtrate or to act as a trap preventing liquid from damaging vacuum pump or vacuum lines.
Silicone rubber stoppers are available in various sizes
#5 and #8b stoppers adapt 13 and 25mm filter holders to 125 ml (#5) and 1 L (#8b) flasks, while #8 stopper fits 47 and 90mm filter holders to the 1 L flask.
Funnel adapters are sold in packs of 7 (size 1 - 7).
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