Material: aluminum Quantity: one set Size: 24 x 10 x 3.3cm (the size is measured by hand, there may be some errors, please understand) Premium quality: Premium Roller Ball ink dries quickly, no leakage, no smudge, no smudge , no streaking, no ink even after long time use. Acid-free, non-toxic ink pens for your everyday writing, marking and signing needs. Perfect for your daily use. Helps you keep your work clean and organized. The ink is more like a liquid, which allows you to write smoothly. They will be great additions to your school supplies. Beautiful Pen Gifts: The Best Gifts for Birthdays, Children's Day, Back to School. Suitable for children, students, teachers, families, friends, colleagues, birthdays, Christmas. Ideal as journal pens, planner pens, journal pens, teacher pens, homework, office supplies, planner accessories and class prizes. Perfect for school, home, office, work, business, clubs, parties and event organization. Excellent service: If you have any questions about our products, please contact us in time, we will answer your questions.