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 Gearbox Gear: Specifically crafted with 15 tooth, these 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 trains Dimension: Each gear features a 15 tooth design that fits seamlessly into your train's gearbox system, ensuring optimal functionality and performanceSingle Piece Package: Each purchase includes a main gearbox wheel axle gear, allowing you to replace or upgrade individual components as needed in your model train collection Size Chart: Pore Diameter: 0.134cm/0.05inchDiameter: 0.297cm/0.12inchLength: 1.396cm/0.55inch Package Includes: 1 Pieces 1/87 Electric Train 15T Gears Note: Please allow slightly errors 1-2cm differences due to manual measurement.