Schaller Classic Hauser Machine Heads Model: 3 left 3 right Wings: Acrylic Shaft: white nylon Shaft spacing: 35 mm Shaft diameter: 10 mm Ratio: 1: 16 Including: 8 mounting screws   Finsih: Gold This mechanism has been built unchanged for many years. Worm gears and shafts become precise and stable the low-torsion base plate mounted. Tuning is without noticeable friction between the two movable parts possible.