XL ProSteels are D’Addario’s brightest bass guitar strings. The
unique, highly magnetic alloy in ProSteels delivers super-bright
tone with magnified presence and attack. Made with a high carbon
steel core and stainless steel wrap wire, ProSteels produce
enhanced interaction with magnetic pickups, offering a palette of
harmonically rich, brilliantly penetrating highs, combined with
pronounced, tight-and-tough lows. Made for 5-string basses,
45-130 Regular Light gauge strings take our most popular bass
gauge and add a low B-string.