The Wave Drums create the soothing sounds of the surf, with a great new feature: we sealed the little steel balls between two drum heads, one synthetic, and the other natural goatskin. This means you can choose between two completely different timbres within the Wave Drum. Our most compact wave drum. Best for home practice, smaller studios and one to one sessions. Special Features: Adjustable sound: the sealable filling port lets you remove or add steel balls. Fewer balls give a softer sound, more give a louder one Two different drum heads offer distinctive sounds Soothing ocean sound promotes relaxation Drumming on any side increases energy Size: 16" (41 cm) diameter, 35.38 oz (992 g) weight Material and Color: Siam Oak (Hevea brasiliensis Muell.-Arg.), Walnut Brown Hand Selected Goat Head Synthetic Head