Brass nut, jazz type neck width of 38mm,the one that sits in a slot. Photoed terribly.
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1 Set Bass Bridge Nut Replacement 38mm Bell Brass Nut Adjustable Guitar String
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Musiclily 42x3.5x6mm 4 String Slotted Brass Nut For Precision Jazz Bass PB JB
Musiclily 43x3.5x6mm 4 String Slotted Brass Nut For Precision Jazz Bass PB JB
