This 17-pc set is ideally constructed for all types of liquid and solid measurement activities. Clear see-through components include blue tinted removable plugs at the base. Great for volume comparisons and relationships between various solids. Removable bases can also be used for plane geometry. Shapes include: Large square prism, small square prism, large rectangular prism, small rectangular prism, pentagonal prism, hexagonal prism, large triangular prism, small triangular prism, square pyramid, triangular pyramid, pentagonal pyramid, hexagonal pyramid, large cylinder, small cylinder, cone, sphere, and hemisphere. Made with durable plastics and has rounded edges and corners.