Our Plastic Stamper can not only used by teacher, but also for students. Its good ergonomic design, makes it easy to handle and easy to use. With its fine workmanship, it can ensure its practicality. You can change the question by turn the wheel. You can buy it to your kids to improve their math ability. Features -Color:Assorted Color -Material:Plastic -Size:6.50X4.50X3.00cm/2.55X1.77X1.18in -Note: The volume of the ink bottle is 5 ml. -Made from plastic material with a comfortable touch, you can use it with peace of mind. -Using plastic material, the School Stamper can be supported for a long time. -Its good ergonomic design, makes it easy to handle and easy to use. With its fine workmanship, it can ensure its practicality. -Make kids complete math practice unconsciously while playing, kids will love it and love math. -This math stamps set creates joy and excitement for kids. Your kids will like it. Package list: 4 x Stamps 4 x Bottles of Stamp Ink