AmScope PS-P12X3-A 36-Specimen Kids Set of Color-coded Zoological and Botanical Prepared Specimen Slides 12 slides with 36 specimens This slide set is good for educational use for kids, entry-level students or home school programs This item is brand new from the manufacturer. There is no risk of contamination from previous use Slides dimensions: 60mm x 20mm x 1 mm. Material: plastics (good for kids microscopes) Some slides (like insects ...) are designed for stereo microscopes with top and bottom lights. For those slides compound microscopes will not give the best microscopy images