Tamiya Grade-Up Parts Series TAMIYA 4WD MINI TUNE UP PARTS 2-Stage Aluminum Roller Set 13-12mm 15398 These parts are genuine Tamiya products that have been modified. Bearings, screws, and other original included parts are included. It is also possible to change to the 2-stage roller (15418) with rubber rings of the same shape. If you have a desired color scheme, please feel free to ask. Processed using a high-precision Okuma machining center. Shipping will be via Yu-Pack. Please note that we cannot be held responsible for any accidents during shipping. Due to work commitments, shipping will be on weekdays. For multiple purchases, shipping via Sagawa is also possible. In that case, please inquire with the desired quantity. These are personally made items utilizing my work experience. We appreciate your understanding. The item has been opened once, and only the item has been taken out and repacked, so please consider it as a used item. Processing may cause fine scratches, but we handle them with the utmost care. Please understand that these are personal creations and no claims or returns are accepted. If you have any requests for your own original shapes, please inquire. We will do our best to accommodate your desired design.