Pilot MR Retro Pop Rollerball Pen - Marble Light GreenAbout Pilot MR Retro Pop Rollerball Pen Marble Light Green The Pilot MR Retro Pop pen comes in a series of trendy metallic colours with a silk finish and has a complementing pop art design centre ring. The MR Retro Pop rollerball pen is refillable, comes fitted with a medium black refill and is presented in a metal storage case. Also available as a matching ballpoint pen or fountain pen.