GHS 1600 White Bronze Roundwound Dobro Resonator Guitar Strings are designed and used by professional players. The gauging and materials have been selected to provide long-lasting bright tone for all playing styles. The core to wrap ratios give you brilliance, sustain and volume - a great combination to make sure you are heard, loud and clear. Excellent for resonator/slide guitar. 16-18-N28-N36-N46-N56. Pure nickel roller wound strings generate brilliant tone for a long time. Made the highest quality strings. Includes 6 String. String Guage Range: 16-56).