This is a rollerball that is made with Frank Mueller watch parts with a special colored abalone. It had a stainless steel body insert with a delrin insert in the cap. It takes a # 5888 Schmidt refill for ink. I can convert it over to a fountain pen. It has been turned and polished by hand. It comes with a pen sleeve to protect the pen. All my pens are one of kind and can't be completely duplicated.