Wanmu Magic Pens & Refills for Kids, Disappearing Ink Pens with Pencil Grippers, Grooved Writing Practice Tools for Children's Magic Copybooks, Handwriting, Grooved Kids Book

.Category: Invisible ink pen

Color: Yellow (Blue pen)

Material: Plastic

Function: Vanishing ink pen and reusable groove handwriting practice

Pen product size: 5.31 × 0.39 × 0.39 inches/13.5 × 1 × 1 cm

Grip product size: 1.57 × 0.59 × 0.59 inches/4 × 1.5 × 1.5 cm

Packing list: 2pcs × Pen, 20pcs × Pen refills, 2pcs × Pencil Grippers