Features OPTICAL GLASS: These microscope slides are made of excellent optical glass with high transparency to ensure clear identification of samples. SAFE OPERATION: With fine workmanship, these slides have no incisive edges, will not scratch when used, suitable for children and adults use. MICROSCOPE PARTS: Can be used in conjunction with various microscopes with magnification higher than 20X, suitable for amateur and professional. APPLICABLE SPECIMEN: These microscope slides can be used for observing specimens such as algae cells and plant tissues, clear and intuitive. 25PCS IN 1 SET: Includes 25pcs glass slides to help kids explore natural and scientific curiosity, making classroom teaching more interesting. Specification: Item Type: Microscope Slide Material: Glass Application: Use a microscope to observe the function of algae cells Package List: 25 x Glass Slides 1 x Storage Box Package List 25 x Glass Slides 1 x Storage Box