Our creative and educational Math Stamp can not only be 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, and this Math Roller Stamp some math multiplication and division questions quickly and conveniently. Features -Color:Assorted Color -Material:Plastic -Size:4.80X4.50X3.00cm/1.89X1.77X1.18in -Note:Random Pattern - Features of an automatic oil discharge, you can never worry about the oil break which destroys your complete pattern of the stamper -Students will be so glad to get an award like this, they will be so happy to get progress next time -This Math Stamp is well-designed, which is different from others and makes you stand out -Number rolling stamps are as fun as toys to make learning math fun and easy for kids -Easy to operate, the math problem can appear in front of kids by scrolling the stamp, which can be adjusted Package list: 2 2 Inks 2 x Storage Boxes