Onyx Cassette Fly Reels - Spare Cassette Spools
| Model | Description | Backing Capacity |
| 10538CSP | Cassette Spool for Onyx #5/7 | WF6F + 75yds 22lb PES |
| 10539CSP | Cassette Spool for Onyx #7/9 | WF7F + 100yds 22lb PES |
| Model | Description | Backing Capacity |
| 10538CSP | Cassette Spool for Onyx #5/7 | WF6F + 75yds 22lb PES |
| 10539CSP | Cassette Spool for Onyx #7/9 | WF7F + 100yds 22lb PES |