Feature: 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. Specification: Item Type: Fixed RV Window Material: Aluminum Alloy Frame + Tempered Glass + Rubber Sealing Ring Window Size: Approx. 530 x 530mm / 21 x 21in Installation Opening Size: Approx. 500 x 500mm / 20 x 20in Function: Protects your privacy and ensures full sun, doesn't heat the interior of your RV, fully sealed windows keep your camper cold in summer and warm in winter Applicable: Applicable to camper, trailer, RV, mobile house construction vehicle, etc., suitable for storage compartment, living room, lounge or any position that requires windows, can be used for your camper trailer modification and other projects. Package List: 1 x Fixed RV Window1 x Fixing Frame1 x Pack of Screws (12Pcs) Note: 1. It is strongly recommended to find professional engineers to assist in installation to ensure a perfect shopping experience2. Please pay attention to avoid damage caused by bumping when disassembling and assembling3. The product size is large, please confirm that it is the correct size you need before purchasing.4. Please allow slight error due to manual measurement.