Our measuring goniometer ruler is everything you need to evaluate the range of motion. Suitable for physical therapists, home use, and students who want professional materials and effective results. Measurements on the arms of the goniometers are easy to read.Features: - Color: Transparent - Material: Plastic - Size: 20.50 x 8.00 x 0.20 cm / 8.06 x 3.14 x 0.08 inch - Used to measure the movement range of joints such as elbows, knees, and fingers - Can also be used as a general length measuring tool - The clear plastic permits observation of the joint's axis of motion and its range of motion - Designed with a transparent color, convenient for users to identify the scale and measure items - Made of material, tough, wear-resistant, and durable - Suitable for engineering, angle measurement, student drawing, architectural design, carpentry, and length measurement Packing list: 1 x angle ruler