Scaled to fit 4/4 size cello with a playing length of 27 1/2 inches (700mm), these medium tension strings are optimized to the needs of a majority of players. This E string is aluminum wound. Helicore cello strings are crafted with a multi-stranded steel core, resulting in optimal playability while producing a clear, warm tone. The smaller string diameter provides quick bow response. Premium quality materials combined with skilled workmanship produces strings known for excellent pitch stability and longevity.