AviProtek bird-friendly glass feature acid-etched visual markers on the exterior surface, or surface one, that maximize the visibility of patterns to birds and minimize the risk of collision. Suited for use in guard rails, linkways and shelters, AviProtek bird-friendly glass can also help with project certification under green building rating systems. All AviProtek bird-friendly glass comes with a 10-year warranty against surface degradation and is supported by EPD and HPD documentation.