The tube is designed to holds a straight 12"L baton. This is an inexpensive solution to avoid damaging the baton shaft. The tube fits our model (145103) American Baton, (C1030) 12" tapered cork handle baton, (145038) All-wood economy baton , (145203) Glow Baton and Conductor Batons (145023, 145024, 145025)