Spare Spools for Orvis Hydros Reels.
- Hydros I for line weights 1-3; 4.7 oz, 3.1” in diameter.
- Hydros II for line weights 3-5; 5.0 oz, 3.4” in diameter.
- Hydros III for line weights 5-7; 5.5 oz, 3.7” in diameter.
- Hydros IV for line weights 7-9; 6.6 oz, 4” in diameter.
- Hydros V for line weights 9-11; 7.7 oz, 4.25” in diameter.