The 85 mm air duct for the Citroën DS is a crucial component of the ventilation system in this classic car. This duct facilitates efficient airflow throughout the vehicle, ensuring a comfortable interior in various weather conditions. Constructed from durable materials, it withstands temperature fluctuations and wear, promising longevity. The 85 mm size is specifically designed to fit seamlessly within the original Citroën DS design. Regular inspection and replacement, if necessary, of the air duct can help maintain optimal performance of the ventilation system.