Life-Size Human Skeleton Model: The knee joint model can be bent to display the ligaments front and back, including Patella's . 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 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- PVC material. Easy to clean, making it the 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.