Features:1. Pen body material: high-quality brass, by twisting, control the indentation of the depth of the pen core2. This product is a brass pencil. It is similar in color to a pencil with a lighter color.3. This product cannot be written on smooth surfaces. Can only be used for ordinary writing paper (A4 paper, notebooks, children's workbooks).4. Draw a gray line like a pencil, but without smudging or erasing.5. No need to sharpen the knife, environmentally friendly green inkless pen. According to the speed of writers writing novels, 10,000 words a day can be used for at least ten years.Specifications:Material: BrassColor: BrassSize: 14*1cmPackage Included:1pc * copper inkless penNote:1. Due to the light and screen difference, the item's color may be slightly different from the pictures.2. Please allow 0.5-2 cm differences due to manual measurement