Features: Perfect for learning addition and subtraction, it features a sliding ruler and number breakdown function. Made of plastic with rounded edges and clear fonts, safe and long lasting tool is great for classroom or home use. Enhancing your mathematical abilities with this handy tool that can be used in the classroom or at home. Use this tool to teach mathematical concepts in an engaging way, whether in the classroom or at home. Perfect for visual learners; With its double functions, it allows for more efficient and effective teaching. Specifications: Material: Plastic Color Options: 3 Colors are Available as Shown in the Picture. Length: approx.25.5cm/10.03in (More Size Detail, Please See Photo.) Package Includes: 2 Kinds of Package(Optional) Package 1: 1Pc Decomposition Ruler Package 2: Set of 2Pcs Decomposition Ruler note: Please allow 1-2cm error due to manual measurement. Please make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks!