4-Stage Osteoarthritis Progression: This knee model set demonstrates degenerative joint disease (osteoarthritis), erosion of joint articular cartilage, progression of degenerative joint disease, and osteophytes (bone spurs) at the articular surfaces Informative Display: This knee degeneration model includes an information card and a display base for convenient presentation; each knee model measures 3" x 1-3/4" x 5-1/2", while the base measures 10-5/8" x 6-1/4" and the card measures 8-1/4" x 6-1/4" Anatomical Learning Resource: Designed for patient education in a doctor's office or healthcare clinic, this anatomical knee model also serves as a classroom teaching aid for explaining knee anatomy, knee arthritis, knee degeneration, and osteoarthritis Detailed Knee Anatomy: Provides a clear visual way to demonstrate the progression of knee osteoarthritis and degenerative changes; this 3D knee osteoarthritis model helps patients, students, and healthcare professionals better understand changes involving the knee joint About the 4-Stage Osteoarthritis Knee Joint ModelSet of four knee models, reduced size, illustrating: degenerative joint disease (osteoarthritis); erosion to joint articular cartilage; progression of degenerative joint disease; osteophytes (bone spurs) at the articular surfaces. Advanced stage knee is articulating for an additional view of the joint. This product contains a set of models, an informational card, and display base. The size of each model measures 3” x 1-3/4” x 5-1/2”. The size of the card measures 8-1/4” x 6-1/4”. The size of the base measures 10-5/8” x 6-1/4”. Our model is great for doctor's offices and healthcare facilities.About GPI AnatomicalsGPI Anatomicals is a manufacturer and distributor of anatomical models. Founded by Scott Galloway in 1980, we specialize in plastic product design and use plastic manufacturing processes to produce proprietary designs of realistic, anatomically accurate models used primarily for patient education. Nearly every part of the human anatomy is represented, from skin, bones, and arteries to eyes, brain, kidneys, prostate, breast, lung and teeth. A newer line for veterinarians includes canine hip, spine, elbow, shoulder, jaw, heart and ear.