Packing Included: 3 pieces 360 Degree Goniometer 6, 8, 12inch, 8inch Bone Goniometer, 6inch 180 degrees Goniometer & Finger Goniometer. Multi scale Display: easy to read, the goniometer head features three scales to allow for a variety of readings. The arm's ruler features both inches and centimeters and can be used on various occasions with 360-degree rotation. Transparent Durable: the goniometer is designed with transparent color, can clearly observe the range of motion of the joint. They are made of high-quality PVC material, tough, wear-resistant, and durable. Design:All medical rulers are made of transparent hard plastic, which can clearly observe the range of motion of the joint, and can be used in various occasions with 360-degree rotation. Occasion:The ruler set is a professional ruler, which can be used for measuring the range of joint motion, measuring the range of finger movement, measuring the angle of the spine, etc. It can also be applied to the production of architectural drawings and horizontal measurement., Manufacturer: Worutuk