Introducing the 10PCS D1 Ballpoint Refills, designed for those who value precision and quality in their writing instruments. These ultra-fine 0.5mm metal refills are perfect for use with electromagnetic pens, ensuring a seamless writing experience that meets all your needs. Compatibility Range: These D1 ballpoint refills are compatible with any electromagnetic pen that uses standard D1 refills. This includes popular models such as Tech 3 and Tech 4, as well as many multifunction ballpoint pens. Enjoy the versatility of these refills across various writing tools. Metal Construction: Crafted from premium metal, these ballpoint refills are built to last. Their high hardness and wear-proof performance ensure that you can rely on them for consistent writing quality over time. Say goodbye to flimsy refills and hello to durability. Smoother Writing Experience: Experience the difference with our water-based ink design. These D1 ballpoint pen refills provide a smoother flow of ink, requiring minimal pressure for effortless writing. Enjoy a comfortable writing experience that glides across the page, making note-taking and creative writing a pleasure. Ultra Fine Tip Design: With a length of 66mm and an ultra-fine 0.5mm tip, these refills offer exceptional accuracy. Whether you’re jotting down notes, sketching, or completing detailed tasks, you’ll appreciate the precision that these tips provide, making every writing task easier and more enjoyable. Comprehensive Package: Each package includes 10 replaceable ballpoint pen refills and 1 small tweezers for quick and easy installation. Please note that the pen is not included. This comprehensive set ensures you have everything you need to keep your writing instruments ready for action. Upgrade your writing experience with the 10PCS D1 Ballpoint Refills. Perfect for students, professionals, and anyone who values quality writing tools, these refills are designed to enhance your productivity and creativity. Don’t miss out on the opportunity to elevate your writing—order your set today!