D'Addario's best selling acoustic guitar strings in a convenient box for easy-access to 25 complete sets of strings at near bulk-rate pricing. / Bulk shop packaging is ideal for workbenches or anywhere bulk packaged strings are needed. / Phospher Bronze is preferred for its warm, bright, and well balanced acoustic tone. / String Gauges: Plain Steel .011, .015, Phosphor Bronze Wound .022, .032, .042, .052 / /