The Traxxas Ball Bearings Black Rubber Sealed (12x21x5mm) 5101A is a high-quality bearing designed specifically for RC vehicles, compatible with Traxxas models. Manufactured in Taiwan, this black rubber sealed bearing ensures smooth and reliable performance for your remote-controlled car, truck, or motorcycle. With the Traxxas brand reputation for excellence, you can trust that these bearings will meet the demanding requirements of RC enthusiasts looking for top-notch parts and accessories.