The X8 Drums Tunable Tambourine features steel jingles that produce a big bright tone. The Tambourine shell is made from thick PVC material that won t break or crack even in classroom environments. Get this tambourine for studios classrooms drum circles music therapy or any music environment that requires heavy duty instruments that will withstand a lot of use. The tambourine drum head is made from a durable synthetic material that resembles a natural goatskin but with a mylar base that adds projection and durability. Tune the head up or down using a standard Allen wrench. 10 in diameter 2 in tall