This 25 Piece Set of Celestron Prepared Microscope Slides will provide hours of enjoyment and discovery. It includes a wide assortment of specimen slides covering insect parts, plant parts, animal parts, etc. - all packaged neatly in a convenient wood carry-case. Each prepared glass slide is 1 x 3" (25 x 76mm), and has a descriptive label. A wide assortment of specimen slides covering insect parts, plant parts, animal parts, etc.