Sterling Silver Rollerball Barley Design. A Sterling Silver, fully hallmarked, Rollerball Pen with a black mouthpiece. The Silver Rollerball Pen has a pull off top and Barley engine turned pattern on the full body of the pen. The Rollerball Pen measures approx 14.5cm in length and approx 1cm in diameter and has an engraving panel by the side of the clip. The Silver Rollerball pen made by our silversmith in the UK, and is presented in a standard black bark effect box with protective sleeve.