Shorty the mini skeleton is made from durable, unbreakable plastic. Measures at: 37.0" and 3.75 lb. Features: 3-part skull (skullcap, base of skull and mandible), removable arms and legs, flexible spine with soft intervertebral discs, specially mounted hip joints to demonstrate natural rotation of the hips and 3 year guarantee. Comes on hanging stand that can be placed on the floor or hung on the wall. Now included with all 3B Scientific Anatomy models is the 3B Smart Anatomy app. This app allows users to register their 3B item to extend the warranty from 3 to 5 years plus free 1 year access to the 3B Smart Anatomy app which includes 23 Anatomy lectures, 117 interactive models and 39 quizzes.