The Classic string is made of a flexible steel core which gives it the warm and brilliant Jargar sound. They are the result of nearly 60 years tradition of hand made cello strings developed by a cellist to cellists. The Classic strings produce a warm and powerful tone. Their playability, sound qualities and durability has made them the perfect choice for both amateurs and professionals for nearly 60 years. They are professional quality strings. Meanwhile Jargar cello A and D are considered to be top sellers among cellists.