The Roosebeck hammered dulcimer string set contains 50 plain steel 0.018" strings, 8 plain steel 0.020" strings, and 4 phosphor bronze wound 0.030" strings, all with loop ends. It's the perfect string set for the Roosebeck 16/15 Hammered Dulcimer.
D3 & E3 - .030 and Wound bronze
D4 & G3 - E4 & A3, F4
B3, F4 - .020 - steel