This angle measurement protractor fits for hospital and office use. It helps to measure the patient's joints and more accurately locate them. Also, it can be used as simple teaching equipment for school students and teachers to use. It is very convenient to use, and it is good for completing your work. It's also essential tool for any toolbox. The black numbers are clear and easy to identify, let you read quickly with high accuracy. Feature - Color: Transparent. - Material: Plastic. - Size: 20.50X8.00X0.20cm/8.06X3.14X0.08 inch. - Made of premium quality material, smooth edges, fine grinding, accurate measurement. - It helps to measure the patient's joints and more accurately locate them, excellent and reliable. - Clear reading. The transparent plastic of the goniometer allows you to place the device directly on joint or limb for easy observation. - The plastic goniometer ruler can be used as medical evaluation tool in different types of physical therapy settings. - It is easy to carry around and can be used for a wide variety of patients' needs. If you're recovering from surgery, this is also convenient set to track your and mobility. Package list: 1 x angle ruler