Da Vinci Bass - E-Bass machine head 10530703 Surface: Satin Pearl Ratio 1:20 Bore 14 mm Weight 51 g/item Mounting: screw lug/ plug Da Vinci Bass - ELEGANCE IN TUNE. The bold design and an outstanding performance will set your instrument apart. Inspired by prestiguious jewelry the all new Da Vinci Bass tuning machine is state-of-the-art technology in an elegant dress. 1:20 gear ratio an 8 genuine Schaller finishes make for a future classic while tuning stability and Schaller's proverbial quality will give any bass a unique Da Vinci upgrade. STYLE - PRECISION - INNOVATION.