This drum is a common drum for acers (9.8 inches / 25 cm / 18 cm) and is used for tight drums. ■ Beep Length: 29.5cm ■ Diameter: 2.0cm ■ Weight: 60-70g ※ As these are hand sharpened, there may be slight differences in the size and weight of the drill. Thank you for your understanding. Each Taiko drum and Perlanco comes with 1 drum drums. Please purchase if you need other items.