CROSS 8511 Blue Ballpoint Refills Lot of 4 - Medium Point

Set of 4 vintage CROSS Ballpoint Pen Refills, model 8511. Each refill is Blue Ink, Medium Point, sealed in original packaging. Compatible with all CROSS ballpoint pens. Reliable quality made by A.T. Cross Company, USA. Perfect for collectors, everyday writers, or those reviving vintage pens. Instructions for insertion included on the back packaging. Easy twist mechanism to install. 📦 Ships fast with care 🖊️ Fits all CROSS ballpoint pens 🎁 Great gift for writers or pen enthusiasts