Rio Mainstream Intermediate Fly Line is a full sinking clear intermediate sink fly line. One of the most versatile styles of sinking line for lake fishing. Great price on full sinking line.
| Line Size | Line Color | Sink Rate | 30′ Head Weight | Full Head Weight | Head Length | Total Length |
| WF4I | Clear | 1.5-2 ips | 133gr (8.6gm) | 164gr (10.6gm) | 37ft (11.2m) | 80ft (24.4m) |
| WF5I | Clear | 1.5-2 ips | 155gr (10gm) | 185gr (12gm) | 38ft (11.5m) | 80ft (24.4m) |
| WF6I | Clear | 1.5-2 ips | 178gr (11.5gm) | 228gr (14.8gm) | 39ft (11.8m) | 80ft (24.4m) |
| WF7I | Clear | 1.5-2 ips | 204gr (13.2gm) | 280gr (18.1gm) | 40ft (12.1m) | 80ft (24.4m) |
| WF8I | Clear | 1.5-2 ips | 225gr (14.6gm) | 315gr (20.4gm) | 41ft (12.5m) | 80ft (24.4m) |
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