Science folks, these Globe Scientific microscope slides are the real deal! Made from borosilicate glass (you know, the good stuff that doesn't break easily), each slide measures 25mm x 75mm with 45° beveled edges and clipped corners for safe handling. The yellow frosted end on one side makes labeling super easy. This pack gives you 144 slides - plenty for classrooms, labs, or serious hobbyists. Important storage tip: keep these in a dry place at room temperature, not directly on the floor, and definitely don't store them with solvents. If you're shipping these or they've been in cold storage, let them reach room temperature before opening to prevent condensation and sticking. The 1.1mm thickness is industry standard, and the quality is consistently reliable slide after slide. Whether you're a teacher stocking your classroom, a researcher needing dependable slides, or a microscopy enthusiast, this 144-pack delivers professional quality without breaking the bank. Just remember - proper storage makes all the difference in maintaining that perfect slide surface!