Roosebeck Harp String Set, 22, C - C 22 DuPont Tynex hard nylon monofilament strings of different gauges. Strings are color coded in red, blue and clear to make it easier to play. This string set fits all MidEast Heather Harps TM, Parisian Harp (HP22), and Hailey Harp TM (HRB22).