This is a Pearl Soundcheck Series bass drum. I'm not very knowledgeable, but I believe it's an 18-inch drum, as the inner diameter is 46cm. It's a used item, but it's in relatively good condition. It has been used very little. The condition is as shown in the photos. It had been left in storage, so it was dusty. I wiped off the dust for the photos, but it's not perfect. Please refrain from purchasing if you are sensitive to this. ● Shipping to Okinawa, Kyushu, Hokkaido, and other islands will cost an additional 1000-2000 yen. Please be sure to inform me before purchasing. If you do not inform me, your order may be canceled. Diameter: Approximately 46 cm (drumhead) Width: Approximately 42 cm (thickness) - Brand: Pearl - Model: Soundcheck Series - Included: 2 stands Thank you for looking.