The Set Consist of specimens of 15 different types of materials. Student measure the mass, Length and volume to determine the density of each of the materials. Set Contains a study storage base with one sample each of walnut, Pine, Maple, Polypropylene, Polyethylene, polyamide, Acrylic, Po l y u r e t h a n e , P h e n o l i c , polyvinylchloride, Delrin, Aluminum, Brass and copper.