$59 Replaces Ventline, Jensen and Elixir vents or Compatible with a 1-1/4" to 2-1/4" Thick Roof,Fits Standard 14" x 14" Openings. One-piece Seamless frame is leak resistant and weather tight. Translucent white lid lets some light through. Roof vent allows fresh air to enter, and heat to escape, while trailer or RV remains locked and secure. Simple, hand-operated crank rotates to open and close dome and eliminates the need for wiring,Including mounting screws..