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| Model | Channel Diameter | Distal Tip Diameter |
| FI-7P | 2.4 | |
| FI-10P2 | 1.4 | 3.4 |
| FI-13P | 1.8 | 4.2 |
FI-7BS | 2.4 | |
| FI-9BS | 1.2 | 3.0 |
| FI-10BS | 1.4 | 3.4 |
| FI-13BS | 1.8 | 4.1 |
| FI-16BS | 2.6 | 5.1 |
| FI-7RBS | 2.4 | |
| FI-9RBS | 1.2 | 3.0 |
| FI-10RBS | 1.4 | 3.4 |
| FI-13RBS | 1.8 | 4.1 |
| FI-16RBS | 2.6 | 5.1 |
denotes a Portable Bedside Scope (no light source needed)