These Stiffeners are used to mount glass to the wall at the end of a railing system and cannot be used to connect two panels of glass. Stiffeners are made from 2205 stainless steel, suitable for high-pressure, highly corrosive environments and feature a brushed satin finish. For use with 13.52-15mm glass. Plastic inserts are provided to keep glass from making direct contact with metal stiffeners.