The Toca Surf Drum is constructed from a high-durability synthetic shell and fitted with synthetic heads on both sides, the slender (1-1/4" wide, 14" diameter head) drum comes with an optimal helping of buckshot-style fill, which roams and rolls inside, producing the sound of cascading waves. Specifications: Made of a highly durable synthetic shell. Synthetic heads on both sides. End cap allows you to adjust the inside fill. 1-3/4" Height x 14" Wide.