Another form of Marimba is popular amongst the natives of Guatemala, in Central America. Its construction is much that of a rough table, the top being formed of twenty-eight wooden bars or keys, from each of which hangs a hollow piece of wood, varying in size; these take the place of the resonating shells of the Zulu Marimba. The instrument is usually about six and a half feet long, by two and a half wide, and the keys are struck by hammers topped with rubber. Three performers often play together with great skill. This form of Marimba is also met with amongst the natives of Costa Rica.