The Dukal Corporation-3468 Goniometer is a precision 12" clear plastic diagnostic measuring instrument engineered to evaluate and track the range of motion (ROM) in large joints such as the knees, hips, shoulders, and elbows. Constructed from transparent, high-clarity plastic, this 360-degree goniometer allows physical therapists, occupational therapists, and orthopedic clinicians to place the protractor head directly over the joint axis while maintaining full visual contact with underlying anatomical landmarks. With easy-to-read dual scale graduations in both inches and centimeters along the arm lengths, it provides reliable, repeatable measurements for injury evaluation, surgical recovery tracking, and rehabilitation progress.