I purchased this used and used it for about 3 months. I was using it on an Oriente HO-20. Because the core is synthetic fiber, I felt the sound was natural and somewhat soft. There are no included accessories. ↓ Quoted from Soundhouse Evah Pirazzi contrabass strings are characterized by a powerful and brilliant tone. They are made from the latest synthetic multifilament fiber and are recommended for 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 page or the official website for the specifications of each string.