These Kadee / Griffin 24 ribbed-back wheelsets are in On30 scale. They're part # 380-300 and offer great performance for your model trains.

To use these wheelsets, simply install them on your model train according to the standard fitting process. Make sure they are firmly attached. When handling, be gentle to avoid any damage. For maintenance, clean the wheels regularly with a soft cloth to keep them running smoothly. Store them in a dry place when not in use to prevent rusting.