Description: 【Compatibility】: Specifically designed for the 1/12 H12Y and H12Y+ remote control cars, ensuring a perfectly fit and enhanced performance 【Quality Material】: Made from durability brass, these components offer great strength and longevity, providing reliable support for your RC car 【Optimal Weight】: Weighing 175g, these parts are engineered to provide the ideal balance and stability for your vehicle during operating 【Dimensions】: The counterweight block and gear cover measure 39mm x 40.4mm x 7.5mm, while the rear axle cup measures 31.7mm x 22.9mm x 28.2mm, ensuring fitting and functionality 【Comprehensive Package】: Includes a pair of gear covers and a pair of axle cups, offering everything you need to upgrade or replace parts on your RC car efficiently Size Chart: counterweight block and gear cover:39mmx40.4mmx7.5mm/1.54inchx1.59inchx0.30inch the rear axle cup:31.7mmx22.9mmx28.2mm/1.25inchx0.90inchx1.11inch   Package Includes: 1 pair gear covers, 1 pair axle cups Note: Please allow slightly errors due to manual measurement and different monitors.