Chemistry Elements Periodic Table Pen Ballpoint Pens with 2019 and 2020 Calendar Periodic Table Reference Sheet for Students Teachers Creative Gifts 10 Pieces

Features: Creative design: There are a sheet of paper inside the pens' shaft, the front side is periodic table reference, the reverse side is 2019 & 2020 calendar, the paper can be rolled out easily, convenient for you to check these information anytime. Study tools: Each ballpoint pens has a black refills in it, can write smoothly, the refills can be replaced, so the pens can be applied for a long time, the periodic table of elements can help your chemistry study, be your study tool. Multiple use: The ballpoint pens are nice gift choices to give your classmates, friends, teachers on birthday, all kinds of festivals, they will love the multi-functional pens, also it is a helper for their chemistry study, and know exact date. Specifications: Color: as the pictures shown Material: plastic Size: Pen: 14.7 cm/ 5.8 inch in length Periodic table: 18 x 6.5 cm/ 7.1 x 2.6 inch (LW) Warm notes: Please allow slight errors due to manual measurement.