Feature 1ALUMINUM ALLOY FRAME: The overall frame of the exit window is constructed from high hardness aluminum alloy with a smooth black paint coating, that is resistant to erosion and oxidation even in outdoor environments. 2WATER PROOF SEAL: The frame is equipped with water proof rubber ring, which provides sealing and shock absorption features. It ensures complete sealing and water proofing of the RV interior when the window is closed. 3UV RESISTANT ACRYLIC GLASS: The 7mm double layer colored acrylic glass (18mm thick convex inside) effectively prevents UV rays, equipped with mesh screen and sunshade privacy curtain internal frame, providing protection against noise, and heat. 4AUTOMATIC SUPPORT ROD: Comes with a pair of automatic pop up hydraulic support rods, which can automatically pop open the window and support it at 75 degrees when needed, with three handles and lockable function. 5WIDE APPLICATION: With 21 x 13in outer frame size, 20 X 12in mounting size, suitable for 28mm wall thickness. Comes with retaining clip ring, matching screws. Suitable for RVs, construction vehicles, etc., provides a solution for your leaking, broken and unsatisfactory windows. Item Type: RV Exit Window Main Material: Aluminum Alloy Frame + Double Layer Acrylic + Rubber Gasket Window Outer Size: Approx. 525 x 325mm / 21 x 13in Installation Opening Size: Approx. 500 x 300mm / 20 x 12in Applicable Wall Thickness: Approx. 28mm / 1.12in Advantages: 7mm / 0.3in thickness tinted acrylic glass outer flat inner convex (inner convex thickness is 18mm / 0.7in), effectively prevent excessive direct UV rays, with automatic pop out hydraulic support rod, which can automatically open the window and fix it at 45 degrees when you need to open the window, 2 handles inside with lock function, equipped with mesh screen and privacy curtain, can protect privacy well and block out sound, and heat, suitable for storage compartments, living spaces, lounges, or any location requiring windows Fitment: Suitable for RVs, mobile homes, etc., providing solutions for your leaking, damaged, and unsatisfactory windows Installation Steps: Step 1: Determine the position where the window will be installed, measure the dimensions and make proper markings Step 2: Cut a square rounded corner hole of 500 x 300mm / 20 x 12in at the installation location Step 3: Place the window into the cut hole and secure with adhesive Step 4: Install retainer ring at the back, clamp the gap between the retainer ring and the outer frame of the window tightly against the wall, and secure the retainer ring with screws Step 5: Apply water proof glue in the blank gap and sand the protruding parts to complete the installation Package List 1 x RV Exit Window 1 x Sunshade Curtain 1 x Retainer Clip Frame 20 x Short Screws 4 x Long Screws Note 1. Please carefully check the size before purchasing and make sure it is the item you need. 2. Installation is of certain difficulty, we strongly recommend that professional engineers perform the installation to ensure your best shopping experience. 3. Please be careful during the installation process and pay attention to safety.