Shorty the mini skeleton with muscles is made from durable, unbreakable plastic. The portrayal of the muscle origins (red) and insertions (blue) on the left half adds to the anatomical value of the skeleton. Measures at: 37.0" and 3.75 lb. Features: 3-part skull (skullcap, base of skull and mandible), removable arms and legs, specially mounted hip joints to demonstrate natural rotation of the hips, muscles are numbered and 3 year guarantee. Comes on hanging stand that can be placed on the floor or hung on the wall.