Manufactured with graphite material, practical and durable for use. Fine workmanship and beautiful appearance ensure the popularity and practicality. These inkless writing pens tips can be regarded as practical gifts for children, students, teachers, friends, etc., they will be surprised to get such delicate gifts. Features -Color:Black -Material:Metal, Graphite -Size:1.60X0.50X0.50cm/0.63X0.20X0.20in -The replacement pen tip is made of graphite material, strong and not easy to break, smooth writing, easy to erase. Screw interface design, easy to disassemble and replace. -Enough quantity replaceable refills, which are sufficient to meet your daily study, office use and replacement. -Ink-free nibs rub against paper, breaking down alloying metal molecules and leaving a writing similar to a regular pencil that can be erased; It does not require sharpening, which helps reduce sharpening time. -They can save you the trouble of buying new pencils and you can share the utility with family and friends. -The replacement nibs are excellent choice as a practical gift to children, students, teachers, friends and more. Package list: 20 Tips