This is a rubber band compatible with Rolex (aftermarket). It is compatible with professional models with a lug width of 20mm, such as Daytona, Submariner, GMT Master, Yacht-Master, and Explorer I. The sizes are approximately 52mm for the shorter side and approximately 68mm to approximately 50mm (cuttable) for the longer side. This type is used by attaching it to the genuine buckle. Please check the lengths of the 12 o'clock side and the 6 o'clock side of your current genuine belt, as well as the length of the buckle, before purchasing. * Please make fine adjustments to the length using the genuine buckle. The width of the part that fits into the intermediate link of the buckle joint is 9mm. (Easy Link compatible) It can be attached to buckles with Easy Link specifications, which allow the length of the genuine bracelet to be easily extended at the clasp. Please check the shape of the product carefully before purchasing. A tool is included as a bonus, but there are some watches where the spring bar remover of the genuine bracelet is too narrow to fit. In that case, please purchase a separate, thin spring bar remover, or use another tool such as a precision screwdriver with a fine tip. If you are not confident in removing and attaching it, please ask a watch store. * Please note that it is not compatible with models with a lug width of 21mm, which have a larger case diameter. * Although it is a new, unused item, please understand that there may be minor scratches from manufacturing or storage due to amateur handling.