Welcome to Giyblacko home themed online mall, improve the quality of life, come to choose beautiful and practical home goods!: Addition And Subtraction Teaching Seal Within 100 Plus And Subtraction Addition And Subtraction Rolling Seal Practice 5ML Ink Features: To give children a atmosphere, there are addition and subtraction teaching to choose from. Small and delicate, easy to store. The delivery includes ink, added ink, recyclable, and print 20x4mm. A good partner for learning and growth, rolling math problems appear in front of you, easy to operate Adjustable, Add ink and use it repeatedly Still manually writing addition and subtraction questions for your child? “Addition And Subtraction Seal Arithmetic Artifact” roll gently and the math problems appear immediately. Advantages:Addition and subtraction 2 styles, to choose. Roller design, combined adjustment. Add seal ink, which can be used repeatedly. Efficient and fast give practice questions, no , no fading. Rotate to adjust 10 different count methods. Product Description: Material:pvc Size :4.4x3x4.8CM color:Multicolor Perfect for arts, crafts and school projects. Brand-new high-quality materials, no pollution to the environment. Suitable for most students, white-collar workers, office workers, schools, offices and so on. You can give it to your friends in the back-to-school season and graduation season, which will be the best gift. Support 30 days return, please contact us in time if you have any questions.