Adjustable airflow, stainless steel oil cooler cover and radiator protection for all Griso models 2005 to 2017. Sliding louver allows more or less air to pass through radiator. Particularly useful for maintaining proper oil temperature in cooler weather and holding in heat to prevent condensation in your oil. If you find oil/water emulsion in your oil, this item can help. Genuine Italian production from Stucchi.