Barska's Prepared Microscope Slides contains 100 properly prepared slides that are good for demonstrations in class or for self-learning at home. This comprehensive collection of specimens spans multi-cellular animal tissues, unicellular organisms, plants, invertebrates, and mammalian specimens. The set of slides is arranged inside a wooden case that provides secure storage. Each of the slides measures 3.0 x 1.0 x 0.04" and has ground edges to ensure safety.