FEATURES The 12-inch 360-degree dynamic arthrogoniometer, which can help us assist in physical therapy by determining the range of motion of joints; it is a device that is always available at home. VERSATILITY OF THE DYNAMIC ARTHROLOGY GAUGE: The Dynamic Angle Gauge can be used to measure the range of motion of joints such as elbows, knees and fingers." CLEARNESS: Multi-scale display for easy reading, 360 The head of the Dynamic Goniometer has three scales for a variety of readings. The scale on the arm displays both inches and centimetres. QUALITY MATERIALS: The goniometer is made of high quality plastic material that is tough and durable, with transparent colours for a clear view of the joint's range of motion. WIDE APPLICATIONS: The 360 degree dynamic joint goniometer can be used to measure the range of motion of joints and the angle of the spine, etc.; it can also be used for architectural drawing production and level measurement. Product Name: Circular Articulated Angle Ruler Product Material: PVC Product Size: 32cm long Colour: transparent Packing list (available after purchasing one product) Angle ruler *1 Please understand: 1.Due to the long shipping time, the item may be damaged during shipping. If the item is damaged, please leave us a message through the official website immediately and then post a comment, I will solve the problem for you. 2. Due to manual measurement, the size may have 1-3cm error. 3. Colour may vary by monitor.