BASS STRING SET D'Addario ProSteels EPS165SL Reg light Top / Med Bottom, Super Bright Round Wound, Super Long Scale (045-065-085-105). LasD Addario ProSteel 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 play and plectrum play. ProSteel strings will give you the punch you need in the mix.