| NAME | CODE | SPECIFICATION | APPLICATION | MODEL NUMBER |
| O-ring | 24.54.251 | FI 1020, FI 1020.1, FI 1020SI, FI 2020, FI 2020.1, FI 2020SI, FI 2030SI, FI 2030SI-TW, FI 4020, FI 4020.1, FI 4020SI, FI 4030SI, FI 4030SI-TW, FI 6020, FI 6020.1, FI 6020SI, FI 6030SI, FI 6030SI-TW | A251 |
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