[Material Information]The tip is made of metal, is small and has a similar color to ordinary pencils, it can write smoothly and the handwriting is easy to wipe with eraser. Long eraser inside, easy to erase [Operating Principle]: The reason this inkless metal pen can write without sharpening or ink is that the tip on the paper to decompose the alloy metal molecules and leave them on the of the paper. An inkless pen can be applied to most papers, and the handwriting can be maintained for a long time, regardless of temperature or weather conditions. [ and Save Cost]Metallic erasable pens can replace up to 100 conventional pencils by using compressed nibs without having to sharpen or replace refills. It helps you reduce the time to sharpen or add ink, save money and you for a long time. [Portable inkless pen]: no sharpening, ink needed. Offers you comfortable writing without worrying about ink interruption. Non-slip pin rod; robust pen clip; comfortable grip. Stylish and delicate design, weight-to-comfort ratio, very suitable for right or left handed children and adults. [PRACTICAL GIFTS]These metal inkless writing pens can be considered as practical gifts for children, students, teachers, friends, etc., do not consume wood, are odourless and safe to use; you be surprised to receive such delicate gifts. Material: colour:black Package Contents: 36 x Replaceable Pen Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.