1. Stacking pen to 2 colors pen, 3 colors pen or more to have fun! 2. Colorful refills for choose. (glitter/ neon series) 3. Imprint area: On the barrel 4. Optional: mini drum for 8 pcs as a gift set Patent No./Country: U.S.A. Delivery Way - Date Of Delivery: 35-40 days after confirmation of order and samples