Are you in need of a portable and practical digital ruler? , take at this item made of sturdy materials. Simple design and craftsmanship make this slide ruler easy to use for long time, a good math learning tool. Features -Color:Pink -Material:Plastic -Size:26.00X4.00X0.50cm/10.22X1.57X0.20in -The math learning slide ruler for addition and subtraction is a versatile and useful tool designed for kids to learn math. -Suitable for addition and subtraction and can help improve kids' mathematical thinking abilities. -Made with sturdy materials, this slide ruler can support long time using without easy deformation. -With its wonderful workmanship and unique design, this slide ruler for kids is simple to use and appropriate for home and kindergarten. -This digital slide ruler can be a thoughtful present choice for your kids and children, showing your love and concern for their education. Package list: 1 x number ruler