A 6-part life-size anatomy model of the muscles of the arm including the rotator cuff. The following muscles can be detached: deltoid, biceps, triceps, long palmar muscle with radial flexor muscle of wrist, and the brachioradial muscle with radial extensor muscle of wrist. May be removed from base. Size approximately 16" x 19" x 19". This is an original 3B model.