Description: 【Durability】The 1:28 RC Car Differential features an all metal differential structure with aluminum alloy gears and housing, significantly improving strength, wear resistance, and impact resistance compared to plastic parts. 【Smoothness】The 1:28 RC Car Differential assembly's precision bearing design reduces friction and ensures smoother rotation, resulting in faster acceleration and more stable handling at high speeds. 【Performance】The RC Car Differential's front to rear power distribution enhances traction on straightaways and corners, providing superior grip for competitive . 【Quiet Operation】The RC Car Differential assembly features finely meshed gears that minimize wear and noise, ensuring quieter operation and extending the lifespan of the RC car. 【Compatibility】The RC Car Accessory is compatible for WLtoys 1/28 models, including 284131, 284161, K989, and 284010; installation is simple, requiring no modifications for direct replacement. Size Chart: Length 3.6cm/1.42inch Outer diameter 1.48cm/0.58inch Bearing dimensions 0.64cm x 0.95cm x 0.32cm/0.25inch x 0.37inch x 0.13inch Package Includes: 1 RC Car Differential set Note: Please allow slightly errors 1-2cm differences due to manual measurement.