43-89 

A set of strings for a 4-string electric bass with a 43-89 drawbar is a set of strings designed for a standard 4-string electric bass, with a specific string thickness. The numbers 43-89 indicate the thickness of the string from thinnest to thickest, expressed in thousandths of an inch (sometimes also in millimeters).

A set of bass strings usually includes four strings of different thicknesses. The thinnest string is usually called the G string and the thickest is called the E string. The D string (D) and the A string (A) are in between.

The choice of a set of bass strings depends on the style of music you play, the feel and sound you are looking for, and your personal playing technique. A thicker set of strings may produce a more powerful and "warmer" sound, but may also be more difficult to play, while a thinner set of strings may be easier to play but have a brighter, less powerful sound.

Ultimately, the choice of string set depends on the player's personal preferences, so some players may prefer a thicker set of strings for a heavier sound and others may prefer a thinner set of strings for easier playability and a clearer sound.