Fixed RV Window 500 X 300mm Aluminium Alloy Waterproof Black Round Corner Window with Fixed Ring For Campervan Caravan for 33‑38mm/1.3‑1.5in Wall Thickness Item Type: Fixed RV WindowMaterial: Aluminum alloy frame + tempered glass + rubber seal ring Window Dimensions: Approx. 530 x 330mm / 20.9 x 13in  Installation Hole Size: Approx. 500 x 300mm / 19.7 x 11.8in  Applications: Fixed Windows with rounded corners can protect your privacy and ensure that the sun does not heat up the inside of your RV, fully sealed Windows can keep your camper cold in summer and warm in winter, used in storage pods, living rooms, lounges or any location that needs Windows, can be used for your camper trailer retrofitting and other projects Application: It is suitable for any location that needs Windows, such as camper trailer RV mobile home engineering vehicle