Durable fountain pen ink absorber set designed for daily school and writing use Strong material for long lasting performance Built with durable materials to withstand continuous use, making these ink absorbers reliable for everyday classroom tasks and frequent refill activity. Efficient ink absorption and reliable filling Designed to support effective ink absorption and smooth filling, reflecting thoughtful overall design and workmanship in fountain pen ink handling. 5piece fountain pen accessory set Includes 5 empty ink refills, providing a ready supply for multiple pens and ongoing practice or testing. Empty ink refill for fountain pens with practical function Practical empty refills that enable easy ink testing, color experiments, and replacement without committing to cartridges, with careful workmanship. Mini ink converter reference Mentioned as part of the product features to indicate compatibility with common conversion or testing workflows. 23 practical use scenarios Student daily writing and ink testing Use the empty refills to practice writing with different inks, test ink flow, and compare color results during class or study sessions. Classroom demonstrations and learning Teachers can demonstrate ink absorption and filling techniques in a safe, controlled way without introducing ink supplies each time. Ink experimentation for hobbyists for fountain pen enthusiasts who want to experiment with different inks, document performance, and keep spare refills on hand for multiple pens. Key attributes at a glance Function: empty ink refills for fountain pens to enable filling, testing, and practice Material: durable construction designed to withstand regular use Contents: set of 5 pieces Performance: practical utility with careful workmanship Compatibility: designed for use with standard fountain pen filling practices and workflows Size: compact, convenient for classroom and use