25.2 X 13.6in Horizontal Sliding RV Window Water Resistant Tinted RV Window with Mesh Screen for Camping Trailer Motorhome For 7mm Thickness Wall Item Type: Horizontal Sliding RV Window Material: Aluminum Alloy + Tempered Glass + Rubber Installation Hole Size: Approx. 640 x 345mm / 25.2 x 13.6in  Window Outer Dimension: Approx. 675 x 378mm / 26.6 x 14.9in  Applicable Thickness: Approx. 7mm / 0.3in Application: This black RV window with tinted glass can block harmful UV rays and ensure the sun doesn't heat up the interiors of your RV. The exposed mesh screen on the window allows fresh air to flow freely, providing a barrier. Simply unlock and slide the window to the side to create light or ventilation when needed, suitable for storage compartments, living spaces, lounges, or any location requiring a window. Fitment: Fit for RV Motorhome engineering vehicles and more 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 corner hole of 640x345mm 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 sealant to any gaps, and sand down any protrusions for a finished installation