Non-powered complete roof vent with galvanized base features selfcentering metal base with radius corners. Interchangeable with all existing RV roof vents. Ventadome roof vents have tough translucent covers for maximum light and air capabilities. Steel construction features easy-open operation. All domes are molded of high impact butylate plastic and are sun resistant. Roof vents include a Colonial White polypropylene dome, manual crank dome lift, screen and frame, extra strong galvanized steel roof flanges and a superior bulb weather seal. Garnish and mounting screws are not included. White in color. Measures 14 inch x 14 inch and requires a 14-1/4 inch x 14-1/4 inch rough opening for installation.