13cm Gel Ink Pen Refills - 0.5 or 0.38 mm $0.55 $1.11 14.3cm Ballpoint Ink Refill - Extended Length Ink Cartridge Replacement for Ballpoint Pens - 0.38mm Fine Tip $0.89 $1.79 11cm Ink Refills for Retractable Pens - 0.5mm Ballpoint Ink Replacement Cartridges $0.79 $1.59 8.2cm Ink Refill for Ballpoint Pen - Black or Blue Ink $0.59 $1.19 11cm Gel Ink Refill - Extra Large Capacity - Retractable Pen Ink $0.59 $1.19