Warwick Just A Nut III Brass 5-string, height adjustable brass nut for 5-string bass, width: 45 mm

Warwick Just A Nut III Brass 4-string, height adjustable brass nut for 4-string bass, width: 38,5 mm

Schaller 393 Nut R3 Gold, Floyd Rose Clamb Nut for Single Cut guitars (smallest String Width), Width 42,86 mm

Goldo Earvana NV43G, compensating G-style saddle, 43mm, compensates each string individually, no permanent modification to your guitar, adapts to any fretboard radius any fret size and string gauge.