Life-Size Human Skeleton Model: The knee joint model can be bent to display the ligaments front and back, including Patella's bones. Our knee joint model offers an exceptional study aid for anyone looking to study the movements of the knee joint. APPLICATION: The model of the knee can be used for science education, students study, display, teaching.The anatomical model will make a great addition to a therapist's treatment room, anatomy classroom, or clinician's office. It also makes a great present for professionals and students. SPECIALLY MOUNTED ON A BASE: With a plastic base for standing, the anatomical model can be removed from the stand for closer examination of all sides for your further study. The shoulder joint model is made from a very strong non-toxic PVC material. Easy to clean, making it the perfect companion for study or teaching aid. Colour:As shown Material:PVC type:B Package Contents: 1 set X skeleton model Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.