Q is a series cuff. Top with a diameter of approximately 1.5cm Material: sterling silver .925 (7.5% copper) nickel, chromium, etc. are not included at all. It will be delivered along with the box. Questions, If you have any requests, please feel free to contact us. Moreover, since there is also the case if there is no stock that can also be delivered in about two or three weeks, please let us know. Thank you for taking a look.