Pyramid 652 oud strings. This set (652/11, yellow label) is Pyramid’s basic Arabic tuning set. This set now includes the single bass course that was previously only available separately. A good all-around set for Arabic ouds. This set has the same gauges and tensions as their 650/11 set, but with two differences: the wound strings are bronze instead of silver, and the trebles are black nylon rather than clear. This results in a slightly different sound that may suit some ouds or playing styles better.