The Field Controls 46561705 OVD-5 5 Oil Vent Damper Kit is a new and never used product designed to control the flow of oil and prevent air from entering the system. This kit includes a damper that can be easily installed to regulate the amount of oil that enters the heating system, ensuring efficient operation and preventing issues with air in the system. With the trusted brand of Field Controls behind it, this oil vent damper kit is a reliable solution for HVAC and industrial applications.