This is a replacement seal for the guillemin couplings with a 121 mm size. It is made of NBR (nitrile rubber). Suitable for temperatures between -10 to 80 °C (14 to 176 °F).
Pros:
- NBR can be used with water, air, oil, solvents and alcohol
Specifications
Material : Rubber
Inner diameter (mm) : 121
Seal features : Guillemin couplings
Max temperature (°C) : 80
Material quality : NBR (nitrile rubber)
Min temperature (°C) : -10
![NBR Seal 121 mm for Guillemin Coupling [5 Pieces]](https://www.coolgrittools.com/wp-content/uploads/2026/06/f24qp_.ea8f098f_6d93b5d8-9fdc-4ab8-8040-faa2f883008f.webp)




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