Scaled to fit 3/4 size bass with a playing length of 41 3/4 inches (1060mm), these medium tension strings are optimized for a majority of players. This C-Ext string is tungsten wound.Zyex synthetic core strings produce an extremely warm, rich sound. Zyex strings are made from a new generation of synthetic material, creating strings that are incredibly stable under drastic climatic conditions. Settling in on the instrument within a matter of hours, Zyex bass strings provide rich, gut-like, complex tone, combined with power and clarity for both pizzicato and bowing. Zyex bass strings were developed primarily to offer outstanding pizzicato attacks and sustain, as well as superb bowing response. Get the sound and feel of gut strings with more evenness, projection and stability than real gut. D'Addario, the world's largest manufacturer of musical instrument strings, is known worldwide for unsurpassed quality and consistency. D'Addario continues to develop and manufacture exceptional strings and accessories for violin, viola, cello and double bass, incorporating innovative, environmentally friendly packaging that reduces waste and provides protection from corrosion. All D'Addario strings are manufactured in the U.S.A. using proprietary, digitally controlled, state-of-the-art machinery for unmatched performance, set after set.