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Its stylish and elegant design features a stunning blue anodized aluminium grip section and piston nob that contrasts against the transparent faceted barrel, making it an eye-catching addition to your collection. The pen also comes with a piston filler mechanism, giving you a huge ink capacity and consistent and smooth writing that provides a very precise and crisp line variation. The diamond-faceted barrel ensures the pen won't roll away if left uncapped on a desk. The biggest difference between the TWSBI Diamond 580AL and the TWSBI Diamond 580ALR can be found on the grip section. While the AL is smooth, the ALR has a ribbed grip for a comfortable writing experience.\u003c\/p\u003e\n\n\u003cp\u003eWith a history of more than 40 years of manufacturing, including producing high-end pens for other brands, Ta Shin Precision decided to start selling under their own brand, TWSBI. 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No matter your writing style, the TWSBI Diamond 580 AL Silver Fountain Pen is sure to provide you with an enjoyable and reliable writing experience.\u003c\/p\u003e\n\n\u003cp\u003eWith a history of more than 40 years of manufacturing, including producing high-end pens for other brands, Ta Shin Precision decided to start selling under their own brand, TWSBI. 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