Tamiya Grade-Up Parts Series TAMIYA 4WD MINI TUNE UP PARTS 2-Stage Aluminum Roller Set with Rubber Rings 13-12mm 15418 These are modified genuine Tamiya products. Parts originally included, such as bearings and screws, are included, excluding the rollers. Feel free to ask if you have a preferred color scheme. Machined using a high-precision Okuma machining center. Shipping will be via Yu-Pack. Please note that we are not responsible for any accidents during shipping. Due to work commitments, shipping will be on weekdays. For multiple purchases, shipping via Sagawa Express is also possible. Please inquire with the desired quantity. These are personally made products utilizing my work experience. Please understand this. The item has been opened once, and only the product has been taken out and repacked, so please consider it as a used item. Fine scratches may occur during processing, but we handle them with the utmost care. Please understand that these are personal creations and are sold as-is, with no returns. If you have any requests for original shapes, please inquire. We will do our best to accommodate your desired design.