Extend the life of your favoured mini d 1 ballpoint pen with these essential medium cartridge refills.designed to ensure a consistently smooth writing performance, they are perfect for capturing all your important notes and documents with clarity. This convenient 4 pack keeps your go to pen ready for action, whether at your home desk or in the office, offering quality refills specifically engineered for mini d 1 ballpoint pens.features and benefitsfour refills in a blister pack provide ample replacements for extended usemedium point ensures smooth, consistent writing for comfortable everyday useoptimised for compatibility with all mini d 1 ballpoint penslong lasting ink formula means fewer changes and uninterrupted writingideal for both professional office environments and personal home usequick and easy to install, ensuring your pen is always readyspecificationspen type mini d 1 ballpointtip size mediumpack size 4 refillsink type ballpointpackaging blister pack