These smooth-writing ballpoint refills are a must-have for most fountain pen users. The German ink flows freely and the 0.5 mm nib feels comfortable in your hand and won't skip when gliding across the paper. Each refill fits most popular fountain pen brands, so there's no need to go back to buying fountain pens just because you're out of refills, so you can write without interruption and you'll never find yourself without a writing instrument again. Stock up on refills for the office, home, or on the go today - you'll love the reliable writing performance of these affordable refills. DIMENSIONS - 8 pack black replaceable pen refills,Standard compatible refills, refill length is 4.3 inch/ 11 cm, 0.04 inch/ 0.5mm medium tip ENJOY SMOOTH WRITING EXPERIENCE - Our high-quality ball pen produces steady and reliable ink flow! You can use it on any type of paper, guaranteed to deliver strong, even and uninterrupted lines APPLICABILITY - Our Ballpoint Pen Refills Gel ink compatible used in 90% of the world’s pen brands FIT VARIOUS WRITING OCCASION - Ballpoint pen refill is suitable for office, business, school and home etc.; Small and portable, convenient to carry WE ARE HERE FOR YOU - We take pride in the absolute quality of all our office supplies, but for any reason, if you are not completely satisfied, simply our friendly customer support and we will do everything to make you 100% satisfied with your purchase. SO WHY WAIT? CHOOSE US NOW!