28x12 Inch Horizontal Slider RV Window Sealed Water Resistant UV Blocking Tinted Glass Sliding Window with Screen for Trailer Motorhome Item Type: RV Sliding Horizontal Window Material: Aluminum Alloy + Tempered Glass + Rubber Installation Hole Size: Approx. 700x300mm / 28x12in Window Outer Size: Approx. 735x335mm / 28.93x13.18in Thickness: Approx. 7mm/0.27in Fitment: for Camping Vehicle, Trailer, Motorhome Installation Steps: Step 1: Determine the location for window installation, measure dimensions, and mark Step 2: Cut a square corner hole of 700x300mm / 28x12in in the designated location Step 3: Place the window into the hole and secure with glue Step 4: Install fixing rings on the back, tighten the crevice between the fixing rings and the window frame against the wall, and secure with screws Step 5: Apply water resistant glue to the blank crevice and sand down protruding parts to complete installation