The Celestron Prepared Slides - 100 piece box is a nicely wooden boxed set of 100 prepared slides, which will give hours of enjoyment and discovery to the budding scientist. It includes a wide assortment of specimen slides covering insect parts, plant parts, animal parts, etc. Features - " x 3" (25mm x 76mm) Glass Slides - Packed in a Wooden Case - Listing of each of the Slides