Flexocor Deluxe Inspiring Ease and Comfort a lot of core in the sound effortless playability very even string to string balance Features Flexocor Deluxe A- and D-strings are made with a solid steel core which is wound with chrome steel. The G- and C-strings have a rope steel core which is wound with tungsten. The set provides a very deep and warm tone combined with a robust sound volume. Balanced sound spectrum Seamless string to string transitions Direct and effortless response, particularly also on the lower strings Easy playability and pleasant playing feel Relief of the instrument through a soft to medium string tension Excellent tuning stability and immediately playable All of the strings are nickel free. Gauges: MediumSizes: Flexocor Deluxe strings are available in 4/4.Tailpiece Options: All strings have a ball-end.