Package Includes (not including the pen): 20 x Ballpoint Pen Refills Black Ink or 20 x Ballpoint Pen Refills Blue Ink or 10 x Ballpoint Pen Refills Black Ink 10 x Ballpoint Pen Refills Blue Ink Size: The length of the refill is about 7cm/2.75inch, the midpoint of 0.7mm. Standard refills (Remove hat: 6.7cm/2.75inch). (suitable for 14cm/5.51" crystal pen) Suitable for liquid sand pen,tool pen and other stylus crystal pen. Before purchasing, double-check that the specifications are suitable for your pen. Good Quality: Made of metal material, smooth and light. Ink refills work well with smooth writing, water resistant and quick-drying ink; They help extend the life span of your favorite pens. Perfect For Any Occasion: Whether you're taking notes in class, writing a letter, or jotting down a to-do list, our pen refills are perfect for any occasion. They write smoothly and consistently, making them a must-have for any desk or office. Warm Notice: 1.Please unscrew your pen and make sure it fits the 7cm/2.75inch length refill before buying this item. 2.There are some wax in front of the pen refills, please scrape them several times to remove them.