Labasics Glass 50ml 3 Neck Round Bottom Flask RBF, with 24/40 Center and Side Standard Taper Outer Joint 500ml LB-RBF-3Neck-24/40-Glass-500ml 1

This is a great value on a piece of glassware like this. In the interim until I got the proper size glass stoppers, I tried a rubber one, but unfortunately I started with a size #4 which became seriously wedged in the neck. After several failed methods of trying to remove it, I was able to destroy the stopper and I'm glad the glass sustained no damage. A #5 rubber stopper has worked perfectly since. Would highly recommend,

Nehme ich zum destillieren, super Ware, stabil, dickes Glas, schließt dicht ab, hat mit dem Brenner und dem Heißwasser eingießen keinerlei Probleme.

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Love the quality and utility!