Tamiya Grade Up Parts Series Aluminum Roller Set 13mm 15437 These are genuine Tamiya products that have been modified. Parts originally included, such as bearings and screws, are included, excluding the rollers themselves. If you have a desired color scheme, feel free to ask. 1 color... Price + ¥1000 (uncolored) 2 colors (commonly known as double anodizing)... Price + ¥1500 (uncolored) Processed using a high-precision Okuma machining center. For further weight reduction, CAE analysis was used to calculate weight reduction, and lightening holes were machined. In Mini 4WD parts, a difference of 0.1g per piece has a significant cumulative effect. Lightening the outer side is more effective for reducing centrifugal force and improving stability. Shipping will be via Yu-Pack. Please note that we are not 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. We offer discounts for bulk purchases. These are individually made products utilizing my work experience. Please understand this. The product has been opened once to remove the item and repackaged, 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 individually made products and we do not accept claims or returns. If you want custom one-off shaped rollers, please inquire.