The Pirastro Original Flexocor Double Bass D String has a classic feel and sound for developed musicians. The steel core is suitable for all music styles due to its clear tone and immediate attack. The Flexocor strings chrome steel winding has consistent tuning stability and a comfortable feel. The tension gauge is slightly heavier than modern based strings for extra depth. This model has a ball tailpiece end and is designed for 3/4 size double basses.The Flexocor Original string series offers musicians versatile playability and a comfortable feel. The strings have a rope core made from carbon steel which is both flexible and has a loud projection. Because of the flexibility there is access to a wide range of tonal possibilities as the steel is sensitive to subtle nuances in your playing. Each string is chrome wound for extra brightness and a comfortable feel. These strings can withstand heavy bow use and work especially well with arco styles. The medium gauge tension offers the optimum balance between versatility and playability. This string model is ideal for musicians who require clarity and precision.