These Kadee #213 gearboxes and sleeves are for HO scale models. Each package includes 24 pieces of 20-Series boxes with .055 ID and .10 ID bushing/sleeves. They're essential for smooth model train operation.

To use these gear boxes and sleeves, first make sure your HO scale model train is clean and ready. Carefully fit the gear boxes and sleeves into the appropriate parts of your train. You may need a small tool to ensure a proper fit. When handling, be gentle to avoid any damage. For maintenance, regularly check the gear boxes and sleeves for dirt or wear. You can clean them with a soft brush and a little bit of mild cleaner. Store them in a dry place when not in use to prevent rusting. If you notice any issues like loose fitting or unusual noise, check the installation and replace if necessary.