Orvis 2Fbx6110 Hydros Sl Fly ReelsDetailSuperlarge arbor for quick retrieval ratesup to 12% increase in line retrieve. Sealed dragclutch bearing fully sealed inside drag mechanism. Nearly 3x stronger drag with zero startup inertia. Narrow spool for less line stacking, improved tolerances for smooth operation, increased backing capacity. Ergonomically designed asymmetric drag knob. In black nickel. Imported.Hydros II for line weights 35 5.6 oz, 3½" diameterHydros III for line weights 57 5.9 oz, 3•" diameterHydros IV for line weights 79 7.4 oz, 4¼" diameterHydros V for line weights 911 8.4 oz, 4½" diameter