Bulk strings are an alloy of cooper 90% and 10% zinc and last longer than conventional bronze alloy strings. Also the small percentage of phosphorous in the alloy helps them to retain their sound longer. The strings vibrate more consistently and custom designed for perfect balance and tension
Bulkstrings strings are made with the best materials available. The core is in pure USA steel, roundwounding is made with top nickel or top phospher-bronze acoustic - brass wounding available upon request. . Clear tone and lifetime are guaranteed.