Finance and Business What is a sliding box? What is a sliding box? Slide boxes are used to store, organize, and safely transport microscope slides. Available slide boxes can store between 25 to 100 slides and are configured with clasps to ensure secure closure. Related Posts:The USPS Priority Mail Box Size Guide shows the weight of the box.What are the 5 types of microscopes?How much is a Celestron microscope?How To Wear Slides