Sea drum is a frame drum that creates the soothing sounds of the surf. This model has a great new feature: the little steel balls are sealed between two drum heads, one synthetic and the other natural goatskin. This means the user can choose between two completely different timbres within the same drum. A sealable filling port allows for controlling the amount of steel balls inside. The construction of the frame is made of Siam oak. Diameter of the heads: 22”/558.8 mm. Depth: 2.75”/69.85 mm. African Brown colour design with matte finish.