DR Strings - Phosphor Bronze AcousticBass 45-105 Fat bottom and great sustain! Gauges 45-65-85-105 Rare phosphor bronze acoustic bass strings from DR Strings are a departure from the standard, good quality bronze string currently available, with a new, different, and stronger voice You'll notice a distinct improvement in the tone, depth, and sustain of your bass with Rare phosphor strings Bass players who want a fatter, louder sound and a deeper bottom will appreciate the Rare phosphor tone, sound, and feel Gauges 45-65-85-105