These clear pen tubes are for DIY enthusiasts and stationery lovers. Their refillable design allows users to diy their pens with preferred ink refills(not included), making them versatile for various writing needs. Lightweight and ergonomic, they are suitable for prolonged use in classrooms, offices, or . Features -Color:Transparent -Material:PP -Size:14.00X1.50X1.00cm/5.50X0.59X0.39in -Note: pen shell ONLY, not included pen refills -Clear visibility: the transparent pen shell makes it easy to monitor ink levels, ensuring you never run out of ink unexpectedly -Efficient writing: designed for use with gel pen refills(not included), providing a smooth and consistent writing experience without ink spills -Easy replacement: the pen shell's precise dimensions allow for quick refill changes, promoting longevity and reducing waste -Compact: Lightweight and compact. It is easy and convenient to use, and easy to store when not in use -Multipurpose: ideal for use in schools, offices, or , these pen shells encourage creativity and add a to your writing tools Package list: 50 x replacement pen shell