Durable PVC Material: The goniometer angle spinal ruler is made of high-quality PVC material, which is safe and durable, not easy to wear, with clear scale and long service life. Can be used as an ideal medical assessment tool in different types of physical therapy settings. Dual Scale Design: The multi-function goniometer protractor has 2 different scales in inches and centimeters. The measurement range is 0-14 inches, 0-36 cm, making this ruler usable in many areas. 360 Degree Rotation Design: The medical goniometer ruler can be rotated 360 degrees and is suitable for various occasions, which helps to accurately determine the range of motion of joints in physical therapy, sports therapy, etc. Transparent Design & Easy Reading: The semi-transparent design of the goniometer plastic ruler is easy to read. Allows you to place the device directly on a joint or limb for easy accurate viewing, helping to record angles and quickly. Multifunctional Application: The medical joint measuring ruler can be used to measure the range of motion of elbows, knees and other joints and the angle of the spine. It can also be used to create architectural drawings and level measurements. Color: transparent Quantity: 2Pcs Note: Due to differences in light and screen settings, the actual color may be slightly different from the picture. Please allow for small size differences due to differences in manual measurements.