Ernie Ball Regular Slinky Nickel Wound Medium Scale Bass Strings, 45-105 GaugeErnie Ball Medium Scale Slinky bass strings are constructed utilizing the same production methods and materials as our popular Slinky nickel wound bass strings. Offering the same slinky feel and bright balanced tone, these new strings are specifically engineered to fit basses up to 32. 5 in scale length as well as short scale basses with string through bridges such as vintage Fender Mustangs.