10pcs/Set 0.5mm Magic Slowly Disappear Ink Invisible Pen Refills for School Students Writing Supplies
Imported new materials and advanced technology.
The content of the writing will gradually disappear within 5 minutes.
Used for file security, magic show and other security fields.
It is a good tool for students to practice Chinese characters.
Line Width: 0.5mm
Ink Color: Blue, Black
Including: 10 X Pen Refills+1 X Pen Rod(Random Color)+1 X Writing Posture Correction Device(Random Color)
1. Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you!
2. Please allow 1-3mm measuring deviation due to manual measurement.
10 X Pen Refills
1 X Pen Rod
1 X Writing Posture Correction Device