Each La Bella string set contains eleven nylon, silver plated, wound strings. La Bella provides a four-step, lab tested, tarnish proof technology on these sets that provides vibrant, aesthetically pleasing stings. With 11 or 12 strings in 5 or 6 courses, the oud is usually tuned d"d"/aa/ee/BB/AA/G (2 each) - .022 Plain (2 each) - .028 Plain3:(2 each) - .025 Wound4: (2 each) - .030 Wound5: (2 each) - .034 Wound 6: (1 each) - .042 Wound 1: (2 each) - .022 Plain 2: (2 each) - .028 Plain 3: (2 each) - .025 Wound 4: (2 each) - .030 Wound 5: (2 each) - .034 Wound 6: (1 each) - .042 Wound