NanaGlass SL25, from NanaWall Systems, is a frameless opening glass wall system designed for the exterior of balconies and patios to create an area sheltered from the elements. Having no vertical stiles, it provides uninterrupted views while also forming an insulating air pocket over a building’s façade. The system’s panels slide open or stack to one or both sides. Available in custom sizes and configurations, each panel can be a maximum of 31" wide by 9' tall in 3/8" or 1/2" thicknesses. Standard panel finishes include clear or dark bronze anodized, dark brown, and white powdercoated.