The O-rings with a diameter of 13.5 mm and a thickness of 2.5 mm are essential accessories for model building, especially for RC cars. These O-rings are specifically designed for use with DUALSKY and JOKER 2812/2816 motors, providing a reliable solution for various applications in model building. They come in a convenient pack of 10 pieces, ensuring an adequate supply for multiple projects or as spare parts. The O-rings are made from high-quality materials that guarantee a long lifespan and effective sealing. They are an indispensable element for the maintenance and operation of RC vehicles, as they help optimize motor performance and ensure the functionality of the models. These small parts are easy to install and contribute to the efficiency and reliability of your RC cars.