Dianshi Pen, Retractable Fountain Pen for Primary School Students Grades 3-6, Writing Practice And Learning, Replaceable Ink Cartridge, 784 Small Cabin Door Fine Nib [Blue Handle - Erasable Blue Magic Ink], 1 Pen with 5 Ink Cartridges

Dian Shi brand ink sac for smoother writing, erasable blue and erasable navy blue, non-erasable black.

Dian Shi brand pen-making, model DS-1784, suitable for steel pen placement.

Dian Shi brand push-button pen special ink sac, erasable magic liquid, multiple colors available, easy installation, new product, available in packs of 5 or 20, small box or rocket pack.

Dian Shi brand pen-making, model DS-784, push-button steel pen, push-button design/non-drying ink/non-leaking ink.

Unique cabin door design for push-button steel pen, patented airtight structure, precise liquid adjustment system, 12mm diameter, ergonomic design for better grip.

Airtight cabin door push-button steel pen, suitable for students, prevents ink drying and leaking, Chinese invention patent number 202211638244.3.

Smooth ink flow with push-button direct liquid adjuster, suitable for youth students, slim pen body with unique groove design for better grip, 14g weight, EF nib for strong writing.

Dopamine color series available for joyful writing experience, replaceable DS-784 ink sacs for easy installation.

Installation instructions provided for ink sac replacement, caution against finger injury during installation.