Domestic (Large) Radiator Caps - Indicates Coolant Temperature. - Helps To Prevent Coolant Injuries. - Integrated Coolant Reclamation Valve. - Improves Under hood Appearance. - Fits Most Domestic Vehicles. - Built In Calibrated Thermometer. Features - Available for domestic and import applications. - Built-in thermometer indicates coolant temperature. - Calibrated in Fahrenheit and centigrade. - 30° to 270° F range. - Color-coded temperature ranges. - Integrated coolant reclamation valve. - Helps prevent coolant burn injuries. - Chrome crown with colored trim ring. - Improves appearance under hood.