Features: This life size degenerative knee joint disease model is designed as a visual leaning aid, all the important details can be easily identified. This model with 4 stages illustrates degenerative joint disease (osteoarthritis), erosion to joint articular cartilage, process of degenerative joint disease and osteophytes (bone spurs) at the articular surfaces. Removable from the stand for closer inspection, highly efficient for display or anatomical study. for Ideal for teaching and studying by doctor or other medical professional doctor. This model is made of high-quality PVC, tasteless, not easy to deform, corrosion resistant and environmentally friendly. Applicable for schools, hospitals, in teaching physical for health, can be used as a teaching knowledge of the physical for health of visual resources, in order to deepen the understanding of the skeleton human foot structure. Specifications: Material: PVC Size: Approx. 265x155x150mm/10.43x6.10x5.91 inches Package Includes: 1 Piece Knee Joint Model note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.