Cooperstand Pro-B Banjo Stand The Pro-B Stand is fabricated from sustainable solid African Sapele hardwood. This stand is designed to temporarily and securely support specific types of instruments in a protected or monitored environment. Pro-B supports an open or resonator back banjo. It will also support certain resonator, jazz guitars, to include Dobro type instruments with bodies up to 3 thick at the bout. The classy highly stable design enhances the professionalism of the performer, and then neatly packs away in most guitar cases or gig bags.