Conceived for the most discerning musicians, Kaplan's KS511 Kaplan Solutions 4/4 Size Cello A strings stand up well to extreme bow pressure, allow a diverse tonal palette, and provide a powerful but warm sound. These cello strings are scaled to fit a 4/4 size instrument with a playing length of 27-1/2" (700mm). Available in three tensions, Kaplan cello A strings are designed to meet the needs of any playing situation.