These lightweight yet tough 19mm aluminum rollers work built-in 520 ball bearings to provide your Mini 4WD device with smooth motion. Also, they could be great for both front component and right back roller setups. The components have really an anodized blue finish for an amazing appearance!
• 19mm Aluminum Ball-Race Roller x2
• Attachment screws included.
• suitable for all Mini 4WD and Mini 4WD expert vehicles.