-. Binding : Office Product -. Brand : TWSBI -. Color : Black, Clear -. EAN : 4711467444318 -. Feature : Piston Filler Fountain Pen / Pen cap is able to post onto the back of the pen / Comes in EF, F, M, B, or stub1.1 nib size choices. / Inner cap to insure a perfect seal when pen is capped / Black, Clear demonstrator -. Label : TWSBI -. Manufacturer : TWSBI -. Model : TWS-M744 4310 -. MPN : M7444310 -. PackageQuantity : 1 -. PartNumber : M7444310 -. ProductGroup : Office Product -. ProductTypeName : WRITING_INSTRUMENT -. Publisher : TWSBI -. Studio : TWSBI -. Title : TWSBI ECO Fountain Pen Black B Nib