Roosebeck Mountain Dulcimer 4-Str, Loop Roosebeck Dulcimer 4 String Set; 3 plain steel strings; 1 nickel plated steel wound on steel string; Loop ends; Tuning and String Gauges:; - - 1: D .012 .300 - Steel; 2: D .012 .300 - Steel; 3: A .014 .360 - Steel; 4: D .022w .560 - Nickel