The Banjira Professional Heavy 7-String Sitar String Set consists of looped end strings made in the USA with the following diameters and materials: String IN mm Material 1 0.012 0.315 Steel 2 0.015 0.376 Bronze 3 0.022 0.559 Bronze 4 0.028 0.711 Bronze 5 0.012 0.315 Steel 6 0.009 0.234 Steel 7 0.009 0.234 Steel tarab 0.009 0.234 Steel