ToughGrade Black RV Window 12" X 22" X 1 1/2" Includes Mounting Ring -22" Length x 12" Width x 1 1/2" Depth -Improved exterior styling: The 8800 series slider has no exposed exterior fasteners which gives the window smoother exterior lines -New screen design: Flush, low-profile screen design improves clearance and retention -New and improved covered weep chambers eliminate exposed weep holes and water track