| Cat. No. | NS | PK | |
|---|---|---|---|
| 7691091 | 10/19 | 1 | |
| 7691092 | 12/21 | 1 | |
| 7691093 | 14/23 | 1 | |
| 7691094 | 19/26 | 1 | |
| 7691095 | 24/29 | 1 | |
| 7691096 | 29/32 | 1 |
The hexagonal LABSOLUTE® hollow glass stoppers with standard ground joint and pointed bottom are made of high-quality borosilicate glass 3.3 and are therefore extremely temperature-resistant up to 500 °C. The stoppers comply with DIN 12252 form C. They are resistant to cold lyes/alkaline solutions and strong acids with the exception of hydrofluoric acid and concentrated, hot phosphoric acid. The stoppers can be easily combined with all glass products that have a ground joint such as measuring flasks, Erlenmeyer flasks or round bottom flasks.
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