5pcs/pack Fine Cross Style Blue And Black Ink 0.5mm Medium Nib Ballpoint Pen Refills Writing Smooth Ballpoint Pen Refills - Ballpoint Pens - AliExpress
Office Depot
Cross Converter | Appelboom.com
Cross Fountain Pen Ink Cartridges – Flax Pen to Paper
Amazon.com: Cross Fountain Pen Ink Cartridge - Black (six per card) : Everything Else
Amazon.com: Cross Fountain Pen Ink Cartridge - Black (six per card) : Everything Else