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