Tonareli Universal Cello Case Music Bag- Single Padding This music bag will fit on almost any fiberglass or carbon fiber cello case on the market This music bag also has loops that accept any shoulder straps so the bag can be used as an independent back pack. The bag features a very large hinged music pocket that will accommodate plenty of music books as well as an accessory pocket at the top to hold accessories such as extra strings, rosin, end pin stops, and cleaning cloths