Manual B1D Divided Pickup Unit Interfaces 4-, 5-, or even 6-string electric bass guitars to the G50 Guitar MIDI Converter. Bass Guitar String Spacing 4-string bass: 17-20mm; 5-string bass: 18-20mm; 6-string bass: 18-19mm Dimensions (W x D x H) 152.8 x 11.0 x 7.3mm (Pickup only) Weight 78g (Whole Pickup Unit)