Material: Plastic Size: 1.2cm in diameter Color: As shown in the picture 1. Unique push-button design, space-time capsule fountain pen, small door opens a new writing experience, full of technology, stimulates children's interest in writing. 2. Fine-tipped pen head, smooth ink flow without splashing, suitable for daily homework and calligraphy practice of primary school students, improves writing comfort. 3. Retractable structure, protects the pen tip for longer durability, easy to carry and not easy to damage, is an ideal choice for students. 4. Exquisite appearance and practical functions, cultivate children's love for writing, and show personality and taste. 5. Suitable for a variety of scenarios, whether it is classroom notes or creative painting, it can bring a smooth and stable writing experience. Package includes: 1pc fountain pen