The NeoSCI 70-4002 Ruled Microscope Slides are designed for use in biological laboratories. Made of clear glass, these slides are perfect for observing and analyzing various biological samples under a microscope. The set includes five slides, each measuring 1" x 3" x 0.17", making them suitable for a range of microscopy applications. With free shipping included, these NeoSCI microscope slides offer convenience and quality for your research or educational needs.