This was a commissioned pen I finished for an engineer. He wanted a plain black pen, made from a fancy industrial plastic, with a transparent ink window and stainless hardware. We went with black Ultem, as it works quite nicely. The ink window is standard issue cast acrylic rod, and the hardware is 304 stainless steel, with the clip cut from sheet stock with a jewelers saw, and the cap and section bands turned from rod stock. This was a reasonably straightforward pen to make, but sometimes nice and easy does it! It uses a jowo 6 nib and can be filled via converter or by putting ink directly in the barrel.