Thomastik-Infeld Strings for E-guitar Jazz BeBob series nickel round wound - Set 013rw (BB113)The construction and the material selection are very similar to the JAZZ SWING strings. The difference here is the round wound nickel Nickel wound with low strength but with a rich, jazzy sound. Slightly clearer than a flat wound. Sparkling jazz sound with a little more ''bite'' Complete set of assorted single strings delivered under 669. 321 676. 873 BB113 Medium Light Nickel round wound plain brass plated strings . 013 . 017 . 021w . 030w . 038w .