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| Material | Structure | Stopper Neck |
| Borosilicate 3.3 Glass | Hexagonal Form | NS 14/23 |
| Borosilicate 3.3 Glass | Hexagonal Form | NS 19/26 |
| Borosilicate 3.3 Glass | Hexagonal Form | NS 29/32 |
Hexagonal glass stoppers are produced from borosilicate 3.3 glass. Thanks to its hexagonal cover structure, it prevents it from rolling away from work areas. The rounded and chiseled plug tip creates a sealing structure.
| Material | Structure | Stopper Neck |
| Borosilicate 3.3 Glass | Hexagonal Form | NS 14/23 |
| Borosilicate 3.3 Glass | Hexagonal Form | NS 19/26 |
| Borosilicate 3.3 Glass | Hexagonal Form | NS 29/32 |
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