The Retaining Ring Dynamo Pulley Nut for Citroen 11CV/15CV is a vital securing component ensuring the safe installation of the dynamo cap. Specifically designed for Citroën 11CV and 15CV models, it prevents loosening and safeguards the mechanism while driving. This retaining ring and nut combination offers durability and reliability, crucial for the vehicle's charging system operation. Made from high-quality materials, it is wear-resistant and suitable for vintage Citroën vehicles. Whether you're working on a restoration project or regular maintenance, this part ensures smooth operation of the dynamo in classic cars.