1、Compatibility: Replacement part no. R025. Designed specifically for VX.18.16.21 12mm engines, this 12mm hex nut one way bearing ensures proper fit and optimal performance. 2、Easy Installation and Removal: RC 12mm hex nut one way bearing is designed for easy installation and removal, making maintenance and repairs hassle free. 3、RC 12mm Hex Nut One Way Bearing: Suitable for HSP for RedCat 1/10 RC Car. It is a perfect accessory for your RC car. Nice and wonderful spare part. 4、Durable: Made with iron materials, this hex nut one way bearing is built to withstand the rigors of engine car performance, ensuring durability and longevity. 5、RC Accessories: 12mm hex nut one way bearing is an essential component of the engine, providing reliable power transmission and enhancing the overall performance of your RC car. Item Type: RC 12mm Hex Nut One Way Bearing Material: Iron Weight: Approx. 21g / 0.7oz Diameter: 12mm / 0.47in Compatible: for HSP for RedCat 1/10 RC Car 3 x RC 12mm Hex Nut One Way Bearing Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.