The woods
Beyond the woods on the pens themselves (African blackwood, redwood burl, cocobolo and birdseye maple), any model can be turned from those below. Most vary slightly from piece to piece. Some vary a great deal, and where they do, I say so before you order.
Wood is not a colour swatch.
These photographs show one piece of each. Yours will be cut from another, and it will not match, which is the reason to have a pen made rather than bought. If you'd like to know how a particular wood is running at the moment, ask me before you order.