Nana Wall. Expanding on its line of opening glass walls, the VSW65 Single Track Slider can be used for extra-large openings, with a virtually limitless number of panels each up to 4 feet wide and 9 feet 10 inches tall. The wood panels glide easily on a single low-profile track and disappear into a pocket when open to create a seamless transition from indoors to out. Closed panels lock end-to-end for an energy-efficient seal, the maker says, and the hardware is hidden. The Single Track Slider is available with a single operating door. 800.873.5673.