Product Contents: Size: Thickness: 1.0 inches (2.5 cm); Length: 15.7 inches (40 cm); Material: Boo wood is a soft and light material. Weight per piece: Approx. 3.1 oz (85 g) - 4.2 oz (120 g); Main use: Long drums, flat drums, and Acer Taidrums. Note: *Specific weight cannot be specified. ※The weight is an average weight. You may receive a lighter drab or heavier bee than the noted notation.