🎶 Elevate Your Sound with D'Addario's Prelude Strings! Optimized for 4/4 scale cellos with a 27-1/2 inch playing length. Solid steel core ensures longevity and resilience. Preferred by music educators for student strings. Crafted with precision and quality control. Unmatched protection against temperature and humidity. Solid Steel Core Warm Tone Corrosion Resistant The D'Addario J1010 Prelude Cello String Set is designed for 4/4 scale cellos, featuring a solid steel core for durability and a warm tone. These medium tension strings are the top choice for educators, offering exceptional performance and protection against corrosion, all while being proudly made in the USA.