Model : L-KAT-01 This knee model has a structure of bone, muscle, and joint with femur, tibia, patella and related ligaments and cartilage. This model is designed for knee aspiration skill training, the users can feel the realistic touch and movement of the patella when they simulate the palpation for inserting a needle. The skin has its 3 layers, dermis, epidermis and fat. The ultrasound is also applicable to this model. Despite the fact that the model is designed for knee aspiration, because of the whole anatomical structure, knee related all kinds of operations are available with this one model. For example, Knee implant practice and meniscus tear suture with arthroscopy and skin suture etc.