Zebra Oil-Based Ballpoint Pen Refill for Sharbo X, Minna, SL-F1, Fortia500, Workdash Blue Ink, 0.7mm Point (BR-8A-4C-BL) Zebra Oil-Based Ballpoint Pen Ink Refill for Shabo X, Mina, SL-F1, Fortia500, Work dash BR-8A-4C-BL