This product is mainly used after fixing operation of fracture around knees caused by non-shifting knee joint bone fracture; After operation of knee synovitis caused by wound knee joint synovitis; After the meniscus sutures operation caused by side ligament injury of knee joint intercross ligament; Knee joint cartilage damage slipped membrane and crinkled wall syndrome or there is some other membrane joint illness that needs to apply the brake after treatments and rebuild operations. [Product Introductions]: The healing train with this product can obviously enhance the treatment effects after operation of joint wound, accelerate the injured joint organizations to rebuild and cure themselves, and prevent the conglutination of joint after operation. So it greatly shortens the treatment period. [Specification]: Size: C (mm) Large (L): 380--430 Medium (M):350--380 Small (S) :330--350