Thank you for viewing. This is a 13mm all-aluminum bearing roller (tapered type) for Mini 4WD. It is a genuine Tamiya product, not an aftermarket part. I am selling these to clear out my inventory. They are used and have scratches and dirt. The screws are not included, as they were only for the photo. The listing is for one pair (2 pieces) as shown in the image. I have confirmed that they spin, but they were removed from a car that was not used, so please understand that they are junk parts before purchasing. Recycled materials may be used for packaging. No returns accepted.