Hollow Glass Stopper
The hollow glass stopper is mainly used in sealing of standard port glassware. It should have nice appearance and practicability. The frosted surface should be fine and the taper should be accurate, so that it has a high vacuum effect after sealing. Our specifications are relatively complete(standard interface). It is suitable for single neck flask, 3 neck flask and other flasks with strandard size necks.
Material:borosilicate glass 3.3
Size:14#,19#,29#,34#,40#,45#,50#,60#
Size Details for Reference:
| Standard Size | Upper Diameter (mm) | Lower Diameter (mm) | Full Height (mm) |
|---|---|---|---|
| 14 | 17 | 13 | 24 |
| 19 | 23 | 17 | 26 |
| 24 | 26 | 19 | 28 |
| 29 | 33 | 25 | 28 |
| 34 | 37 | 28 | 30 |
| 40 | 42 | 32 | 30 |
| 50 | 56 | 45 | 34 |
Why use hollow glass stopper for flasks?
Because the flask often needs to be heated, because of the heating problem, if the solid one and even use boro 3.3 material, it will be easily broken due to uneven heating, and the if the stopper is hollow inside,it can ensure that it will not break after heating.
