Our measuring goniometer ruler is everything you need to evaluate the range of motion. Suitable for physical therapists, home use, and students who want quality professional materials and effective results. Measurements on the arms of the goniometers and are easy to read. Feature- Color: Transparent. - Material: Plastic. - Size:20.50X8.00X0.20cm/8.06X3.14X0.08 inch. - Used to measure the movement range of joints such as elbows, knees and fingers. - Also, it can be general length measuring tool. The clear plastic from the goniometer permits observation of the joints axis of motion, and its range of motion. - The goniometer is designed with transparent color, convenient for users to identify the scale on it and measure items. - They are made of good quality material, tough, wear resistant and durable, owing to long life span. - Suitable for engineering, angle measurement, student drawing, architectural design, carpentry, length measurement.Packing list: 1 x angle ruler