Borghini Rollerball Chrome Green. The Borghini Guilloche Prestige Rollerball has a rhodium plated metal cap which has a finely engraved guilloche style wave pattern. The body of the pen has a soft touch green colour for easy grip. The body diameter is 15mm and the pen is 14.5cm long. Each Borghini pen is presented in it’s own smart clear plastic display box with a Borghini printed card cover.