7pcs/set Handwriting Calligraphy Magic Pens Blue Ink Ink Disappearing Pen Practice Tools

Label:Yes Package: 1Pen with 6Refills Length: 14cm(5.51in) Name: Automatic fade pen Refill color: blue Line width: 0.5mm(0.02in) 1. This product is suitable for students to copy workbook copybooks, do exercises, children's drawing, handwriting will disappear in about 20-30 minutes, disappear without leaving traces, does not affect rewriting, does not affect repeated use of the writing board. 2. The fade rate is related to weather temperature and humidity.The ink refill is environmentally friendly, safe, non-toxic and non-polluting. You can slide the refill back and forth on the eraser before use.