Designed to be eight times stronger than vinyl and twice as strong as steel, according to the maker, the Integrity by Marvin Ultrex pultruded-fiberglass product line now includes the All Ultrex Sliding Patio Door. Available in five exterior colors with a stone white interior, the door has a standard 3 3/8-inch jamb depth with factory-installed jamb extensions also available. The Grilles-Between-the-Glass option includes three available lite cuts. 888-537-7828.