Seven inch brass porthole Thermometer Hygrometer comforter with Mahogany stand. This beautiful brass nautical Thermometer Hygrometer dual unit is designed to withstand the toughest outdoor marine conditions. The solid brass case has been doubly protected with a zirconium plating based on chromium plating. It will never tarnish or discolor. This quality brass instrument would be an excellent choice for any marine vessel to add classic nautical flair and functionality. The brass case features a working hinged porthole and four mounting holes in the base flange. Four brass mounting screws will accompany the instrument which requires no setting - ready to use. The thermometer measures the temperature in both Celsius and Fahrenheit. The hygrometer measures relative humidity in percentages.