Thomastik-Infeld Double bass strings Belcanto - Set of 4 strings (BC600)Steel rope core especially developed for bow play Chrome wound Soft, warm sound, excellent response Excellent bow response for classic Natural pizzicato sound for jazz Orchestral tuning. 3 4 size for scale length 1040 1060mm (41 41. 7"), also suitable for 4 4 scale length up to 1100mm (43. 3"), medium tension G: 28. 3kg 62. 2lbs D: 28. 8kg 63. 3lbs A: 29. 3kg 64. 4lbs E: 28. 8kg 63. 30lbs H B: 29. 5kg 65. 1lbs Set of 4 strings consists of G, D, A, E