Examine carefully - Life-size human bone model that can be viewed accurately from all sides. The overall dimensions are life-size. The model comes pre-assembled and we do not recommend disassembling it. Screws can be loosened or tightened to adjust the pelvis flexibility; screw removal is not recommended. Anatomical pelvic bone model - Life-size female pelvic anatomy model that shows anatomically accurate features of the human female pelvis, including left and right innominates (hip bones), pelvic bones (ischium, ilium and pubic), sacrum, coccyx and pubic joint, acetabulum, and foramina (obturator foramina). Includes cartilage at the pubic joints for accurate and realistic details. Made for classroom use - For use in the classroom to illustrate the birth passage through the pelvis. The passage diameter is approximately 4 to 10.2 cm. The model is stationary and not flexible. Ideal for classroom demonstrations and self-study at home. Demonstrating lessons - Visualize the female pelvis in three dimensions. Clinicians and physiotherapists who specialize in health issues in women use this model to demonstrate concepts. It supports patient education and is a useful tool for comparing male and female skeletal anatomy.