Ink Free Permanent Uprights Pencil Technology Unlimited Letter Perpetual Inkless Pencil Features: Eternal Inkless Pencil: The tip of the inkless pen rubs on the paper to decompose the alloy metal molecules and leave on the surface of the paper. Regardless of temperature or weather conditions, it can keep handwriting for a long time. Durable material: made of high quality materials, writes smoothly, comfortable grip, high quality pencil for writing and drawing.he theoretical writing length of this product is 159 times that of a wooden pencil. Portable: no sharpening of a knife, no ink. No need to sharpen the pencil, no wood consumption, no writing to end. So you can shorten the time to sharpen or refill. Stylish design: stylish and sophisticated design. Provide comfortable writing, no need to worry about ink interruption. It can be used repeatedly, the eraser can be erased and the pen tip can be replaced. Best Gift: As practical gifts for children, students, artists, teachers, friends, etc. What a brilliant choice for students, painters, artists, teachers, etc. Specification: Material:Plastic Size:16.2CM/6.73in Weight:10g Package including： 1 x Inkless Pencil Item Name:Student Ink free Eternal Pen Straight Pencil White Colors:White Package Includes:1 Ink free pencil Product Material:Plastic My store sells a variety of home furnishings. We will provide you with excellent service and quality goods.