DescriptionZebra Pen F-Series Refill helps you extend the life of your favorite pen. The easy-glide ink you love is at your fingertips with this 10-pack of black ink refills in 0.7mm fine point. Never worry about running out of ink again with refills on hand. Compatible with Zebra Pen 301A Retractable Pens, F-301, F-301 Ultra, F-301 Ultra Designer, F-301 Compact, F-401, F-402, F-701, Expandz and Silver Select. Check the barrel of your pen for your preferred point size. Effortless refill means you can get back to what’s important in your writing. Keep extras in your supply cabinet.