Heavy 4 string set for electric bass guitar from Black Beauties series with black K3 colour-coating that delivers clear and musical sound, equal to the sound of uncoated strings. Strings have more volume, less unwanted undertones, greater clarity and articulation than standard strings. They also last longer as any other coated strings – three to four times as long as uncoated strings, but sound as good as uncoated strings, and provide protection against corrosion and perspiration. Strings are made with steel round cores and special black nickel-plated steel windings. Gauges: .050, .070, .090, .110.