By Sonor. 13″ diameter rotary timpani with a genuine calfskin head, wood shell, and proven central tuning mechanism; range approximately G-e (2 G’s below middle C, to the E above). The technical advantage of Sonor timpani lies in the unimpeded transfer of vibration from the head to the shell. The design of the Sonor rotary timpani is based on nearly 100 years of experience by Sonor in the construction of timpani. Mallets sold separately. The legs of the drum are height-adjustable; the lowest setting is at approx. 24-3/8″ total height (from the floor to the top of the drum), and the highest setting is at approx. 36″ total height.