Tamiya Grade-Up Parts Series TAMIYA 4WD MINI TUNE UP PARTS Aluminum Roller Set 13mm 15437, 2-stage 15398 19mm Black-Coated Plastic Ring 15426 These are genuine Tamiya products that have been modified. Parts originally included, such as bearings and screws, other than the rollers, are included. If you have a desired color scheme, please feel free to ask. These were 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 about the desired quantity, etc., via the question function. We will sell at a discount for bulk purchases. These are personally made items, utilizing experience gained from work. We ask for your full understanding. Please consider these as used items, as they have been opened once and only the items have been taken out and repacked. Processing may result in fine scratches, but we handle them with the utmost care. Please understand that these are personally made items and we ask for no claims and no returns. If you would like custom one-off shaped processed rollers, please inquire via the question function.