La Bella CT750 Cuban Tres Strings 6-string set, 3 Courses- Plain Steel & Silk & Steel Ball-ends Made in the USA with American wire Packaged using MAP Technology (Modified Atmosphere Packaging) to prevent tarnishing and ensure freshness This set of high-quality strings was made for the Tres, a small Cuban guitar distinguished by its tapered body and three double courses that are widely spaced out on its guitar-sized fingerboard