Product Name: High Quality 4-Stage Osteo-Arthritic Artificial Plastic Knee Joint Model NO.: ZL-HS13851030 Type: Skeleton Model Material: PVC Certification: CE Customized: Non-Customized Condition: New Trademark: ZHonGLI Transport Package: One Piece One Polybag, Than Bulk on Polybag Specification: life size Origin: China HS Code: 90230000 Product Description High Quality 4-Stage Osteo-Arthritic Artificial Plastic Knee JointSet of 4 Knee Models (3/4th Scale) illustrating Degenerative Joint Disease (Osteoarthritis); Erosion to joint articular cartilage; Progression of degenerative joint disease; Osteophytes (bone Spurs)) at the articular surfaces.Model size: 3" x 1 3/4" x 5 1/2"Education Card size: 5-1/4" x 6-1/2"Ideal for clinical display and consumer education