Scale Compatibility: Designed specifically for 1/87 scale model trains, this Power Box is for enhancing your HO scale electric train setup Materials: Constructed from ABS and metal, ensuring long term performance and reliability in your model train system Compact Design: Each power pickup measures 5cmx2cm/1.97inchx0.79inch , making them easy to integrate into your existing track layout without taking up excessive space Complete Set: The package includes 10 digital power connecting clip , providing ample components to upgrade your train track Easy Installation: These power box are designed for straightforward installation, allowing you to quickly enhance the electrical connectivity of your model railway tracks Size Chart: 5cmx2cm/1.97inchx0.79inch Package Includes: 10 Model Trains HO Scale Spare Parts Note: Please allow slightly errors 1-2cm differences due to manual measurement.