The Duragraph™ model was launched in 1923, and shortly afterward it was considered to be 'the definitive' pen. The model was named by combining the words, durable and graph to equal Duragraph™.Created to last as an heirloom to serve many generations, the Duragraph™ is offered with a lifetime guarantee, and brings a fresh, modern style to the timeless oversize flat top design. Hand made from Premium Acrylic European grade resins and substantial in size, yet not so large to be unwieldy in the hand. The cap top mounted clip allows the pen to sit low in the pocket, making this model a great choice for everyday use. The stainless steel Jowo premium nib is available in Extra Fine, Fine, Medium, Broad, Stub and Omniflex™, ideal for individual handwriting styles. The fountain pen uses international size cartridges or a threated piston ink converter (included). The ballpoint pen accepts Parker style ballpoint refills. Each Conklin® fine writing instrument comes in a luxury gift box.