A. This Teacher's Triangle Ruler Set with Magnetic Triangle Board is a useful teaching tool for geometry classes. The plastic triangle board with a magnetic design allows teachers to demonstrate geometric concepts with ease. The detachable handle makes it convenient for users to carry and store. Made of high-strength plastic material, this tool is durable and long-lasting. B. Color: Yellow 2 C. Material: Plastic D. Size: 50.70X29.80X0.50cm/19.93X11.71X0.20in E. Easy classroom demonstrations: the magnetic design of this triangle ruler makes it convenient for teachers to demonstrate various concepts in the classroom. F. Detachable handle for convenient storage and transportation: this triangle ruler comes with a detachable handle, allowing for easy storage and transportation. G. Made of high-strength plastic material for durability: this triangle ruler is constructed using high-strength plastic material, ensuring its durability and long-lasting use. H. Suitable for teaching geometric concepts: this triangle board is specifically designed for teaching geometric concepts, making it a suitable tool for geometry lessons. I. This triangle ruler provides versatility and allows for a wide range of teaching applications. J. Package list: 1 x Set Square