The clear-anodized aluminum jambs of Antonio Citterio's Pavilion partition system and Planus Due door incorporate an elegant shadow line. The door is 23 to 36 inches wide in clear, frosted, or colored glass; gray or brown oak; or colorfully lacquered wood. 150 East 58th Street, 8th Floor, New York, NY 10155; 877-878-7374; tre-piu.com.