This is a new, unused item. The quantity is 1. The item shown bundled in the second photo is the item in the first photo. The circumference is 120cm. Therefore, the diameter was calculated to be 38.21cm. (Please note that there may be a few millimeters of error as this was measured with a tape measure at home.) We have many other items such as humidifiers, cosmetics, and projectors available ❤️ Please take a look here! →#sakuママの商品☆ The following is quoted from the purchase site. An O-ring is a ring-shaped packing with an O-shaped (circular) cross-section. It is generally installed in a groove and compressed appropriately to seal a wide variety of fluids such as oil, water, air, and gas. Shipping is anonymous. Please note that the shipping method may be changed after purchase between Raku Raku Mercari便 or Yuu Yuu Mercari便. If you have a specific shipping preference, please contact us in advance via message. This is stored and packed by an amateur, so please purchase only if you understand this. 0