1Set Automatic Fade Pen Kit Magic Disappearing Refill Invisible Ink Gel Pens Groove Copybook Calligraphy Board Practice Tools Blue 10PCS Refil Best Price Guranteed 1Set Automatic Fade Pen Kit Magic Disappearing Refill Invisible Ink Gel Pens Groove Copybook Calligraphy Board Practice Tools Green 10PCS Refil Best Price Guranteed 1Set Automatic Fade Pen Kit Magic Disappearing Refill Invisible Ink Gel Pens Groove Copybook Calligraphy Board Practice Tools Black 10PCS Refil Best Price Guranteed Descriptions: 100% brand new and high qualityName: Automatic fade penLength: 14cmLine width: 0.5mmRefill color: bluePackage: 1SetFeature: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 board2. 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 new refill back and forth on the eraser before use.Note: 1. There is 2-3% difference according to manual measurement. Please check the size carefully before you buy the item. 2. Please note that slight color difference should be acceptable due to the light and screen. 3. If you need more, please contact us and we will give you a discount. 4.if there are something wrong with the quality, quantity and the type of the product, please fell free to contract our customer service. 5.Thank you for your kindly understanding! buy lanjingyi 1Set Automatic Fade Pen Kit Magic Disappearing Refill Invisible Ink Gel Pens Groove Copybook Calligraphy Board Practice Tools Black 10PCS Refil without regret! buy lanjingyi 1Set Automatic Fade Pen Kit Magic Disappearing Refill Invisible Ink Gel Pens Groove Copybook Calligraphy Board Practice Tools Green 10PCS Refil without regret! buy lanjingyi 1Set Automatic Fade Pen Kit Magic Disappearing Refill Invisible Ink Gel Pens Groove Copybook Calligraphy Board Practice Tools Blue 10PCS Refil without regret! Type:Gel Pen ;Length::14cm; Line width::0.5mm Refill color::Blue; Feature 1:Automatic Fade Pen ;Feature 2:Magic Gel Pens Feature 3:Invisible Ink Kit ;Feature 4:Magic Pen Kit ;Feature 5:Automatic Fade Pencil