Purchased used and used for about 3 months. Used with Oriente HO-20. The core wire is made of synthetic fiber, so it felt like a natural and soft sound. No accessories are included. ↓ Quoted from Sound House Evah Pirazzi contrabass strings are characterized by their powerful and brilliant tone. Made from the latest synthetic multifilament fiber, they are recommended for both arco and pizzicato playing. Specs ■ Contrabass string set ■ Mittel ■ 3/4 size ■ G: 449120 D: 449220 A: 449320 E: 449420 ■ Please check the individual string product pages or the official website for the specifications of each string.