Truly unique: CARBON ROTOR carbon HANDLE FULL METAL CONSTRUCTION spool body DESIGN AND CONSTRUCTION OF JAPAN EVA soft grip handle Skid control winding Very fine and long front advance Lightweight cold forged aluminum spool, and the same backup The design and materials of the handle removes any gaps V-shaped rotor V-shaped spool vibration damping system Zauber 4000 model has three lightweight aluminum cold forged spool - two deep and one matches