Each replica is scientifically cast to provide reproductions of unexcelled anatomical accuracy and minute detail. Although the model is made of natural bone-colored urethane plastic. it looks and feels like real bone. Osteo-Models™ are removeable for hand demonstration; Metatarsus. Tibia. Fibula. Hock joint. Phalanges with nails. Achilles tendon. Metatarsus tendon. Demonstrates: Foundation of movement. Lever action at pivot point. Mounted on a wood grain base. with brass name plate.