The S.T. Dupont Dfi, meaning \’Challenge\’ in English, features a frame in precision-injected, palladium-plated metal a technique used in the aeronautics industry with an outer shell of precisely-perforated, full-grain calfskin that feels as comfortable as your favorite driving gloves. The Dfi\’s dynamic shape is responsive, elegant, and fiercely contemporary with an ideal weight. The integrated design of the elongated clip lets it slip into your pocket without the slightest resistance. The Dfi sets new visual and performance standards, challenging the traditional concepts of pen design. Technical Specifications Manufacturer S.T. Dupont Collection Dfi Type Ballpoint Body Material Leather, Chromium Retractable Twist Mechanism Grip Diameter 1.35 cm Length 14cm Weight 41grams Limited Edition No Refill Schmidt EasyFlow 9000