Set of 20 sample sized squares of various materials Each material sample measures approximately 1x1 inch. The full sleeve of materials measures 13 inches long and 10 inches wide Includes iron, stainless steel, aluminum, wood, polythene, brass, rubber copper, wool, nylon, cork, lead, zinc, carbon, glass, PVC, cotton, cardboard, perspex, nickel Fun way for children and students to learn about different materials and their characteristics Materials are neatly labeled and organized in a plastic sleeve This Materials Collection Kit is a great way for students or children to explore different kinds of materials and their characteristics. Each kit contains 20 different materials that are neatly organized and labeled in a plastic sleeve. The materials include iron, stainless steel, aluminum, wood, polythene, brass, rubber copper, wool, nylon, cork, lead, zinc, carbon, glass, PVC, cotton, cardboard, perspex, nickel. This is a great educational kit for any classroom or home