The 4306-00 is a great option to upgrade the multi-scale nut on your 4-string bass.
It is pre-slotted for a quick and simple installation.
Flat bottom.
Measurements
Length: 2.076” / 52.74mm
Thickness: 0.13” / 3.3mm
Height: 0.23” / 5.92mm
String Spacing: 1.524” / 38.71mm