VivaRhythm Boom Series Djembe delivers a lower overall tone with outstanding projection. The synthetic shell features a rubber bottom to prevent slippage or scratching and is shaped to allow air to escape from the shell. This creates low fundamental tone that resonates fully. The BOOM SERIES pre-tuned synthetic heads give a robust attack. Each drum is stackable inside the other for easy storage and transportation.Size: 8" head diameter/41,3 cm height. Materials: Synthetic shell, Synthetic head. Features: Synthetic shell is perfect for outdoor playing.