High-quality electric bass guitar strings treated with Cleartone's patented coating to keep them sounding fresh for 3-5 times longer than the competition. Get those smooth, bold tones you crave without constantly having to change sets. All Cleartone Electric Bass Strings are made from premium US sourced nickel plated steel. It is not recommended using string cleaners on Cleartone Strings. Simply wipe down strings after use with a clean dry cloth.