Classic Green Nonagon.Classic Green Nonagon Made from Conway Stewart Classic Green material, the Classic Green Nonagon is a nine sided pen designed for the discerning writer. Its unique shape makes it comfortable to hold and easy to slip into a pocket or bag, while also looking elegant on a desk. Each pen in this range is finished to a high standard and comes with a size six Jowo nib and Schmidt K5 ink converter. The pen also comes with a polished steel nib in the tip size