Warwick M5B EMP COATED 5-String Bass Strings Medium One Micron That's all that stands between you and your bass' tone EMP strings feature Enhanced Molecular Protection that is a unique micron-thin coating that protects your bass strings against corrosion EMP Bass strings feel like an uncoated set of strings, yet last much longer For the first time you can have a long lasting bass string with the tonal output and feel of an uncoated bass string