Material: The Ho Scale Train wheels are made of alloy, ensuring long term use and resistance to wear and tear Good Performance: These wheels offer good rotation, shock absorption, and low noise operate, enhancing your model train's performance Suitable for 1/87 Scale Trains: Perfectly designed to fit HO 1/87 scale model trains and scenes Universal Compatibility: Ideal for retrofitting 1/87 DC electric train carriages, making them a versatile addition to your model train accessories Package Includes: Each pack contains 2 pieces of the Ho Scale Train Wheels with dimensions of 23.2.38cmx1.32cm/0.94inchx0.52inch each, providing great value for your money Specification: Material: Alloy Size Chart: Total Length:2.38cm/0.94inch Wheel Outer Diameter:1.32cm/0.52inch Wheel Inner Diameter:1.1cm/0.43inch Wheelbase:1.43cm/0.56inch Package Includes: 2HO Scale 1:87 Metal Wheels Note: 1.This is not infant toy , please take away from children to avoid eating. 2.Please allow slightly errors 1-2cm differences due to manual measurement.