Aquila Corde produces the finest gut strings and synthetic strings, for historical and modern musical performance. This Aquila Guilele set is specifically designed for the Guilele that has a scale length of about 17 inches or 432 mm with six strings. Nylgut strings are quickly becoming the choice of ukulele players worldwide and we have received many positive comments. Some have said that Nylgut strings have transformed their instruments. Polished Nylgut trebles include a Nylgut 3rd string and the silver-plated copper basses have a Nylgut core.