The 86U, Red Series Nylgut Concert Low G Ukulele Set – Low G from Aquila features all-red Nylgut, a synthetic material that provides all the acoustic properties of traditional gut, but without the defects. The tuning of the string set is in the key of C with G, C, E, and A strings. The set offers great attack and remarkable stability of intonation, especially under moist conditions. The Red Series strings utilize a different approach by changing the weight of the material, but not the gauge, which results in a brighter sound with a better response throughout the fingerboard.