Our Math Stamp, made of , sturdy and practical, which can be and to use. This Math Roller Stamp is small and , can be reused many times with ink, the seal is clear, and it will not fade after drying. Features -Color:Blue -Material:Plastic -Size:7.50X6.50X3.20cm/2.95X2.55X1.26in - 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 happy to get an award like this, they will be so happy to get 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: 1 x Math Practice Stamp