R aven Black, hardware not included, (20x17" Bass Drum) Shell The shell is a key factor in a drum's ability to "rumble," or resonate. Accordingly, the Stage Custom employs 100% birch - a classic in the realm of high-class drum kits. Moreover, with its six-ply structure the Stage Custom accurately conveys the vibrations produced at the impact surface, achieving performance that overwhelms anything in its class. Ball Mount & Clamp A tribute to Yamaha design technology, our original ball mount and clamp has gone through very few modifications over the years. A large, ultra-hard resin ball sits in an attractive chromed housing, held in place with a titanium ergonomic wing bolt. It is the ultimate drummer-friendly mount, offering non-slip positioning virtually anywhere the drummer can imagine. Additionally, it permits tuning of the bottom head by simply rotating the drum. Die-cast claw hook New Stage Custom adopts Die-cast claw hooks with rubber insertion plates to reduce noises. BD leg with stopper Bass drum legs of Stage Custom have the stoppers to make setting easier.