16 X 20in RV Window Rounded Corner Double Layer Acrylic Hydraulic Support Rod Privacy Protection for Caravan Trailer Item Type: RV Window Material: Aluminum alloy + dual layer acrylic glass + rubber Size: Approx. 425x525mm / 17x21in Installation Hole Size: 400x500mm / 16x20in Suitable for Wall Thickness: Approx. 25mm / 1in Functions: 7mm thickness of double layer tinted acrylic glass, flat on the outside and convex on the inside (the thickness of the inner convex is 18mm), with automatic pop up hydraulic support rod, when you need to open the window hydraulic rod can automatically pop up the window and fixed 75 degrees of support, the internal assembly of the three handles and with a locking function, equipped with screens and shades privacy curtains inside the frame, which can be very great protection of privacy, preventing fly, sound and heat Application: Suitable for RVs, mobile homes and any other places where windows are required, providing a solution for your leaky, broken and unsatisfactory windows