D’Addario Kaplan Solutions “Non-Whistling” E strings provide the traditional rich sound expected from high-quality steel E strings. These medium tension strings are optimized to the needs of a majority of players. The precision plating process also provides for a string with enhanced corrosion resistance. The string is specifically designed to solve open E-string "whistling" occurrences. It produces a warm, rich tone that blends very well with lower strings. Kaplan Solutions “Non-Whistling” E includes one free Kaplan Ball End Adapter for use on single hook style fine tuners.

D'Addario Kaplan Solutions violin string composition: Aluminum over stranded steel