Deluxe reproduction has actual bone made X-ray opaque by the addition of special chemical filler during casting process. Removable calvarium cap for neurocranial studies. Break-away maxilla revealing paranasal sinuses supported by spring-mounted, detachable mandible. Bones of one hand and foot on opposIt'sides articulated wIt'springs for joint flexibility. Skeleton disarticulates into 12 pieces. Stand included. Size: 5' 4" tall.