Corrosion-resistant graphite body CFR : Cyclonic Flow Rotor 5 ball bearings + 1 roller bearing Quick-Set infinite anti-reverse system Machine cut brass pinion Precision elliptical oscillation 2 tones aluminum spool Metal round line clip RES II : Computer balanced Rotor Equalizing System Design rigid handle EVA handle knob on size up to 4000 TPE handle from size 6000 and up Multi-disc, Japanese oiled felt drag washers