BASS STRING SET D'Addario ProSteels Regular Light 4 Strings for Bass, Super Bright Round Wound, long scale (45 - 65 - 80 - 100). The ProSteel Strings are our brightest and most magnetic strings. A special steel alloy offers us great harmonic richness and brilliance together with a depth of sound, this set of characteristics work together to obtain the much-coveted "piano tone". Perfect for both finger playing and plectrum playing. ProSteel strings will give you the punch you need in the mix.