- Ballpoint Pen Refill for Cross Black #8513, Blue #8511, or Red #8515 QUALITY - Free-flowing, long-lasting, smooth writing ink with 1 mm Medium ballpoint tip. Original manufacturer quality with metal shaft. Packaged in reusable zippered bag. IMPORTANT - Before ordering, remove your refill, measure its length and diameter, and to pictures here. Refills are 4.563 inches / 116 mm long, and the diameter of the metal shaft is .12 in / 3 mm. Refill has plastic top with threads and screws into place. If your refill pictures and dimensions order with confidence. Search “Ballpoint Pen Refill for Cross” on for video with more details. SATISFACTION GUARANTEED - If you are not satisfied with our refills, just let us know and we will make it right. SUPER VALUE - Why pay $5 to $10 and get just 1 refill?