Elevate Your Writing Experience. Discover the pinnacle of writing technology with Jetstream Prime Ink Refills, tailored for those who demand excellence in every stroke. This exclusive set includes five premium refills, each crafted to enhance your writing with unmatched smoothness and precision. Featuring innovative ultra-low friction ink, these refills offer a seamlessly smooth, addictively satisfying writing experience that adjusts effortlessly to any speed or pressure. The ink's advanced formula significantly reduces writing resistance, delivering quick-drying, clear, and dark lines that minimize smudging and maximize neatness - perfect for fast-paced environments where clarity is key. With about twice the blackness density of traditional inks, Jetstream refills ensure vivid and impactful writing, ideal for both professional documents and creative endeavors. Each refill is meticulously manufactured with a durable metal body and a precise 0.38 mm tip, meeting the ISO 12757-2 G2 standards for compatibility. These features not only guarantee a consistent and reliable writing experience but also ensure compatibility with a range of writing instruments, including the popular Jetstream Prime series models SXK-3000 and SXK-3300, as well as other brands adhering to the same international standards. Designed to meet the growing demand for ultra-fine ballpoint pens, the Jetstream Prime Ink Refills are suitable for writing detailed notes and extensive texts with grace and efficiency. Whether in the office, classroom, or studio, these refills are the perfect companion for anyone seeking a superior writing tool that combines style, functionality, and long-lasting performance. 5-Pack Value SetOil-Based Ink: BlackBall Diameter: 0.38 mmSize: Diameter 5.9mm x Length: 98.2 mmWeight: 3.4 g Quality Made in Japan