HO Scale Train Accessories: Perfectly designed for HO scale model train enthusiasts, these gears are essential components for enhancing your model train setup1/87 Train shaft Gear: Transmission gears are for a wide range of electric trains in the 1/87 scale, ensuring smooth and efficient operationMaterial: Made from pp, these gears offer durability and reliability, providing long term performance for your model trainsDouble Layer: Each gear features a Double Layer design that fits seamlessly into your train system, ensuring optimal functionality and performanceBulk Packaging: Conveniently packaged with 5 pieces per pack, this set offers great value and ensures you have plenty of spare parts on hand for future projects or repairs Size Chart: diameter 0.75cm/0.30inch Package Includes: 5x 1/87 Electric Train Gears Note: Please allow slightly errors 1-2cm differences due to manual measurement.