The Genuine Porsche Door Mirror Trim Ring is a high-quality replacement part for the exterior door mirrors of Porsche vehicles. It is designed specifically for the 99173172900OK1 model and is made from durable materials to ensure long-lasting performance. This trim ring is an essential component for maintaining the sleek and stylish appearance of the vehicle's exterior, as well as protecting the mirror from damage. It is an authentic Porsche product and is designed to fit perfectly and function seamlessly with the rest of the vehicle. Upgrade your Porsche's exterior with this Genuine Porsche Door Mirror Trim Ring.