-. Binding : Office Product -. Brand : TWSBI -. Color : Demonstrator, Aluminum Silver -. EAN : 4711467444240 -. Feature : Our ever popular 580 now has aluminum milled parts (Grip, connector, piston rod) / Piston filler type fountain pen. Easy twist to fill, no hassle. / 580 has improved the smoothness of cap thread turning / 580 has increased ink capacity, about 30% more than 530 / Comes in EF, F, M, or B nib sizes. Please look at other listings for different size -. Label : TWSBI -. Manufacturer : TWSBI -. MPN : M7444240 -. PackageQuantity : 1 -. PartNumber : M7444240 -. ProductGroup : Office Product -. ProductTypeName : WRITING_INSTRUMENT -. Publisher : TWSBI -. Studio : TWSBI -. Title : TWSBI Diamond 580AL Silver Fountain Pen nib EF