The pen is an acrylic body with gold hardware with a twist mechanism.
To refill, use a Cross refill. Pull off the top half of the pen, and unscrew the empty ink supply. Then screw in the new refill.
Each pen is one of a kind and shipped in a carboard box to protect the pen. Other decorative boxes are available, but sold separately.
All Instrument bodies are hand formed using a lathe and other wood working techniques in our Kentucky, USA facility, and the instruments are assembled in the same facility.