◎Provides on/off control with the main valve. Allows delivery of preset volumes of gases or liquids to reactions using the needle valve.
| Product Code | Cone Size | Stopcock Bore(mm) |
| A10241402 | 14/20 | 2 |
| A10241902 | 19/22 | 2 |
| A10242402 | 24/40 | 2 |
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