Tamiya Grade Up Parts Series Aluminum Roller Set 13mm 15437, 2-stage 15398 These are genuine Tamiya products that have been processed. Parts originally included, such as bearings and screws other than the rollers, are included. Discounts are available for multiple purchases. 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-Packet Mini. Please note that we cannot be held responsible for accidents during shipping. Due to work commitments, shipping will be on weekdays. Multiple purchases are also possible. In that case, please inquire with the desired quantity, etc. We will sell at a discount for bulk purchases. These are personally made items utilizing my work experience. We appreciate your understanding. The items have been opened once and only the items have been taken out and repacked, so please consider them as used items. Processing may result in fine scratches, but we handle them with the utmost care.