Mini 4WD aluminum rollers, 13mm. Color is blue. These are genuine Tamiya parts, not anodized. These are used, so they are listed as slightly dirty, but please check the condition carefully in the photos. Please consider this with the above in mind. I am selling these because I have retired from Mini 4WD. If you have any concerns, I will add more photos. Please understand that I will not accept cancellations after purchase.