The Otto Musica Artino Select Series Carbon Graphite Cello Bow is a great choice for the advancing player. The better-quality bow features a balanced carbon graphite stick with a nickel full-lined ebony frog with a double eye. This Artino carbon graphite bow also features unbleached horse hair for exceptional performance. The Otto Musica Artino Select Series Carbon Graphite Cello Bow is available in 4/4 thru ¼-size.