Rubber Stopper
what are the uses of glass tubing, rubber tubing and rubber stopper in the laboratory?
It’s actually very simple.
Glass tubing is a long, clear tube used as a passage for liquid or gas in experiments.
Rubber stoppers are used as plugs in flasks or test tubes.
Rubber tubing is often connected to a condenser, which is a laboratory tool used in the process of distillation. The rubber tubing helps cool water to flow in and out of the condenser and helps the heated water vapour in the condenser return to its liquid state.
Hope this helps 
The Heligoats “Rubber Stopper” @ Ames Progressive
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