The protractor is perfect for math teachers, it has clear scales to make sure your drawing is correct. With the tool you can demonstration of solving the math geometric problems. The protractor can be teacher's good helper. Features -Color:Orange -Material:Plastic -Size:50.00X28.00X3.00cm/19.65X11.00X1.18in -Note: There are color difference on the product - This is have tool at the math class, with this tool the teacher can show the process of solving the geometric problems. - This protractor is using of plastic material, which has high strength, for using - This protractor tool is professional protractor designed for the math teaching use - It has ergonomic handle, which is convenient for people to use and hold - With this protractor tool, teachers can teach the method to solve geometric exercises Package list: 4 x Protractor