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.