This model can accommodate one A clarinet. Its design was developed to be more practical, light and to safely transport the instrument. The case has supports at the sides so that the clarinet do not touch the case floor and also foams on the top so that there is no pressure on the instrument keys. It has a front pocket for accessories and extra space inside. MB cases models have a new system that is adaptable for different types of clarinet. The EVA parts and cushions have velcro, so they can be adaptedin order to fit most of clarinets sizes properly. - the manufacturer