The amazing Porsche Steel and Gold TecFlex Fountain Pen is truly one of a kind. With its amazing steel cross weave barrel, its screw on cap and its sleek design it, like the Porsche car, is amazing. With a solid 18ct gold nib (Silver Over-laid) and optional fill (cartridge or bottle fill) the Porsche Steel Fountain Pen is one of the nicest pens to use available on the market.