STM Dux Case for Apple MacBook Pro, Notebook - Black - Thermoplastic Polyurethane (TPU) Rubber, Polycarbonate (PC) - 33 cm (13") Maximum Screen Size Supported Some Aussie terms have made their way into everyday language the world over (good onya, mate), and there are some that haven't quite yet, but we feel should. Like the word "dux." Down Under, it refers to the highest performing student, the one who's best in class. A fitting name, we think, for our line of protective cases that offer the best-in-class solution for laptops and tablets.