- Equally long tuning buttons for standard "A" style mandolins - Configuration: 4 left / 4 right - 4-On-A-Plate design - Mounting diameter with mounting sleeve: 8.30 mm - Distance between shafts: 23 mm - Open - Worm thread above gear - Gear ratio 18:1 - Colour: Nickel EUR 101.00 - See more - Buy online