Brighter for a more cutting tone. Ernie Ball 2504 Pedal Steel Guitar Strings are crafted from stainless steel wire wrapped around tin-plated, hex-shaped steel core wire. Provides brighter sound and extra string life. All Ernie Ball strings are precision manufactured to the highest standards and most exacting specs to assure consistency, optimum performance, and long life. 2504 - 13p / 15p / 10p / 14p / 18p / 22w / 26w / 30w / 34w / 38w