1、Aluminum Alloy Frame: The overall frame of the fixed RV window is made of high strength aluminum alloy, and coated with black powder to ensure long term rust and oxidation resistance. 2、Rubber Sealing Ring: The camper window frame is equipped with waterproof seals on all sides to ensure complete sealing and waterproof performance. 3、Black Tempered Glass: The window is made of 4mm thick black tempered glass to ensure the overall strength and safety of the windows. Tinted glass effectively resists UV rays and heat. 4、Multi Purpose: Round Windows can be installed in storage rooms, doors, roof sections, living spaces, lounges or any other location where windows are needed to increase indoor brightness. 5、Widely Used: The round window is suitable for Teardrop Cargo Horse Trailer campers, RVs, construction vehicles, etc. Equipped with retaining ring and screws for easy installation.