Bonga Toca Percussion. This model has an Afro-Cuban design and sound. The bodies are made of Siamese oak (rubber) and are 6″ and 6.75″ in diameter. The membrane is made of natural leather. The EasyPlay rims in black are of the traditional type. The tensioning hooks are chrome-plated. Bongos are fully tunable. The surface treatment of the bodies is Natural: natural wood.