Thomastik-Infeld Double bass strings Dominant nylon core - Fis/F# (193S)The globaly recognized reference string, unmatched in sound and playability Flexible multifilament syntetic core Insensitive against humidity changes Soft sound, warm and rich in overtones, feel of gut Solo tuning. 3 4 size for scale 1040 1060mm (41 41. 7") Synthetic core, chrome wound, medium tension A: 27. 0kg 59. 5lbs E: 28. 0kg 61. 7lbs H B: 29. 0kg 63. 9lbs Fis F#: 30. 0kg 66. 1lbs Set 4 string 114. 0kg 251. 2lbs